1 /* Updating of data structures for redisplay.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
34 /* cm.h must come after dispextern.h on Windows. */
35 #include "dispextern.h"
38 #include "character.h"
41 #include "termhooks.h"
46 #include "intervals.h"
47 #include "blockinput.h"
50 #include "syssignal.h"
54 #endif /* HAVE_X_WINDOWS */
58 #endif /* HAVE_NTGUI */
64 /* Include systime.h after xterm.h to avoid double inclusion of time.h. */
69 /* To get the prototype for `sleep'. */
75 /* Get number of chars of output now in the buffer of a stdio stream.
76 This ought to be built in in stdio, but it isn't. Some s- files
77 override this because their stdio internals differ. */
79 #ifdef __GNU_LIBRARY__
81 /* The s- file might have overridden the definition with one that
82 works for the system's C library. But we are using the GNU C
83 library, so this is the right definition for every system. */
85 #ifdef GNU_LIBRARY_PENDING_OUTPUT_COUNT
86 #define PENDING_OUTPUT_COUNT GNU_LIBRARY_PENDING_OUTPUT_COUNT
88 #undef PENDING_OUTPUT_COUNT
89 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->__bufp - (FILE)->__buffer)
91 #else /* not __GNU_LIBRARY__ */
92 #if !defined (PENDING_OUTPUT_COUNT) && HAVE_STDIO_EXT_H && HAVE___FPENDING
93 #include <stdio_ext.h>
94 #define PENDING_OUTPUT_COUNT(FILE) __fpending (FILE)
96 #ifndef PENDING_OUTPUT_COUNT
97 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_ptr - (FILE)->_base)
99 #endif /* not __GNU_LIBRARY__ */
101 #if defined(HAVE_TERM_H) && defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
102 #include <term.h> /* for tgetent */
105 /* Structure to pass dimensions around. Used for character bounding
106 boxes, glyph matrix dimensions and alike. */
115 /* Function prototypes. */
117 static struct glyph_matrix
*save_current_matrix (struct frame
*);
118 static void restore_current_matrix (struct frame
*, struct glyph_matrix
*);
119 static int showing_window_margins_p (struct window
*);
120 static void fake_current_matrices (Lisp_Object
);
121 static void redraw_overlapping_rows (struct window
*, int);
122 static void redraw_overlapped_rows (struct window
*, int);
123 static int count_blanks (struct glyph
*, int);
124 static int count_match (struct glyph
*, struct glyph
*,
125 struct glyph
*, struct glyph
*);
126 static unsigned line_draw_cost (struct glyph_matrix
*, int);
127 static void update_frame_line (struct frame
*, int);
128 static struct dim allocate_matrices_for_frame_redisplay
129 (Lisp_Object
, int, int, int, int *);
130 static void allocate_matrices_for_window_redisplay (struct window
*);
131 static int realloc_glyph_pool (struct glyph_pool
*, struct dim
);
132 static void adjust_frame_glyphs (struct frame
*);
133 struct glyph_matrix
*new_glyph_matrix (struct glyph_pool
*);
134 static void free_glyph_matrix (struct glyph_matrix
*);
135 static void adjust_glyph_matrix (struct window
*, struct glyph_matrix
*,
136 int, int, struct dim
);
137 static void change_frame_size_1 (struct frame
*, int, int, int, int, int);
138 static void swap_glyph_pointers (struct glyph_row
*, struct glyph_row
*);
140 static int glyph_row_slice_p (struct glyph_row
*, struct glyph_row
*);
142 static void fill_up_frame_row_with_spaces (struct glyph_row
*, int);
143 static void build_frame_matrix_from_window_tree (struct glyph_matrix
*,
145 static void build_frame_matrix_from_leaf_window (struct glyph_matrix
*,
147 static struct glyph_pool
*new_glyph_pool (void);
148 static void free_glyph_pool (struct glyph_pool
*);
149 static void adjust_frame_glyphs_initially (void);
150 static void adjust_frame_message_buffer (struct frame
*);
151 static void adjust_decode_mode_spec_buffer (struct frame
*);
152 static void fill_up_glyph_row_with_spaces (struct glyph_row
*);
153 static void build_frame_matrix (struct frame
*);
154 void clear_current_matrices (struct frame
*);
155 void scroll_glyph_matrix_range (struct glyph_matrix
*, int, int,
157 static void clear_window_matrices (struct window
*, int);
158 static void fill_up_glyph_row_area_with_spaces (struct glyph_row
*, int);
159 static int scrolling_window (struct window
*, int);
160 static int update_window_line (struct window
*, int, int *);
161 static void update_marginal_area (struct window
*, int, int);
162 static int update_text_area (struct window
*, int);
163 static void make_current (struct glyph_matrix
*, struct glyph_matrix
*,
165 static void mirror_make_current (struct window
*, int);
166 void check_window_matrix_pointers (struct window
*);
168 static void check_matrix_pointers (struct glyph_matrix
*,
169 struct glyph_matrix
*);
171 static void mirror_line_dance (struct window
*, int, int, int *, char *);
172 static int update_window_tree (struct window
*, int);
173 static int update_window (struct window
*, int);
174 static int update_frame_1 (struct frame
*, int, int);
175 static void set_window_cursor_after_update (struct window
*);
176 static int row_equal_p (struct window
*, struct glyph_row
*,
177 struct glyph_row
*, int);
178 static void adjust_frame_glyphs_for_window_redisplay (struct frame
*);
179 static void adjust_frame_glyphs_for_frame_redisplay (struct frame
*);
180 static void reverse_rows (struct glyph_matrix
*, int, int);
181 static int margin_glyphs_to_reserve (struct window
*, int, Lisp_Object
);
182 static void sync_window_with_frame_matrix_rows (struct window
*);
183 struct window
*frame_row_to_window (struct window
*, int);
186 /* Non-zero means don't pause redisplay for pending input. (This is
187 for debugging and for a future implementation of EDT-like
190 int redisplay_dont_pause
;
192 /* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers
193 are supported, so we can check for input during redisplay at
194 regular intervals. */
195 #ifdef EMACS_HAS_USECS
196 #define PERIODIC_PREEMPTION_CHECKING 1
198 #define PERIODIC_PREEMPTION_CHECKING 0
201 #if PERIODIC_PREEMPTION_CHECKING
203 /* If a number (float), check for user input every N seconds. */
205 Lisp_Object Vredisplay_preemption_period
;
207 /* Redisplay preemption timers. */
209 static EMACS_TIME preemption_period
;
210 static EMACS_TIME preemption_next_check
;
214 /* Nonzero upon entry to redisplay means do not assume anything about
215 current contents of actual terminal frame; clear and redraw it. */
219 /* Nonzero means last display completed. Zero means it was preempted. */
221 int display_completed
;
223 /* Lisp variable visible-bell; enables use of screen-flash instead of
228 /* Invert the color of the whole frame, at a low level. */
232 /* Line speed of the terminal. */
236 /* Either nil or a symbol naming the window system under which Emacs
237 creates the first frame. */
239 Lisp_Object Vinitial_window_system
;
241 /* Version number of X windows: 10, 11 or nil. */
243 Lisp_Object Vwindow_system_version
;
245 /* Vector of glyph definitions. Indexed by glyph number, the contents
246 are a string which is how to output the glyph.
248 If Vglyph_table is nil, a glyph is output by using its low 8 bits
251 This is an obsolete feature that is no longer used. The variable
252 is retained for compatibility. */
254 Lisp_Object Vglyph_table
;
256 /* Display table to use for vectors that don't specify their own. */
258 Lisp_Object Vstandard_display_table
;
260 /* Nonzero means reading single-character input with prompt so put
261 cursor on mini-buffer after the prompt. Positive means at end of
262 text in echo area; negative means at beginning of line. */
264 int cursor_in_echo_area
;
266 Lisp_Object Qdisplay_table
, Qredisplay_dont_pause
;
269 /* The currently selected frame. In a single-frame version, this
270 variable always equals the_only_frame. */
272 Lisp_Object selected_frame
;
274 /* A frame which is not just a mini-buffer, or 0 if there are no such
275 frames. This is usually the most recent such frame that was
276 selected. In a single-frame version, this variable always holds
277 the address of the_only_frame. */
279 struct frame
*last_nonminibuf_frame
;
281 /* 1 means SIGWINCH happened when not safe. */
283 int delayed_size_change
;
285 /* 1 means glyph initialization has been completed at startup. */
287 static int glyphs_initialized_initially_p
;
289 /* Updated window if != 0. Set by update_window. */
291 struct window
*updated_window
;
293 /* Glyph row updated in update_window_line, and area that is updated. */
295 struct glyph_row
*updated_row
;
298 /* A glyph for a space. */
300 struct glyph space_glyph
;
302 /* Counts of allocated structures. These counts serve to diagnose
303 memory leaks and double frees. */
305 int glyph_matrix_count
;
306 int glyph_pool_count
;
308 /* If non-null, the frame whose frame matrices are manipulated. If
309 null, window matrices are worked on. */
311 static struct frame
*frame_matrix_frame
;
313 /* Non-zero means that fonts have been loaded since the last glyph
314 matrix adjustments. Redisplay must stop, and glyph matrices must
315 be adjusted when this flag becomes non-zero during display. The
316 reason fonts can be loaded so late is that fonts of fontsets are
317 loaded on demand. Another reason is that a line contains many
318 characters displayed by zero width or very narrow glyphs of
319 variable-width fonts. */
323 /* Convert vpos and hpos from frame to window and vice versa.
324 This may only be used for terminal frames. */
328 static int window_to_frame_vpos (struct window
*, int);
329 static int window_to_frame_hpos (struct window
*, int);
330 #define WINDOW_TO_FRAME_VPOS(W, VPOS) window_to_frame_vpos ((W), (VPOS))
331 #define WINDOW_TO_FRAME_HPOS(W, HPOS) window_to_frame_hpos ((W), (HPOS))
333 /* One element of the ring buffer containing redisplay history
336 struct redisplay_history
338 char trace
[512 + 100];
341 /* The size of the history buffer. */
343 #define REDISPLAY_HISTORY_SIZE 30
345 /* The redisplay history buffer. */
347 static struct redisplay_history redisplay_history
[REDISPLAY_HISTORY_SIZE
];
349 /* Next free entry in redisplay_history. */
351 static int history_idx
;
353 /* A tick that's incremented each time something is added to the
356 static unsigned history_tick
;
358 static void add_frame_display_history (struct frame
*, int);
359 static void add_window_display_history (struct window
*, char *, int);
361 /* Add to the redisplay history how window W has been displayed.
362 MSG is a trace containing the information how W's glyph matrix
363 has been constructed. PAUSED_P non-zero means that the update
364 has been interrupted for pending input. */
367 add_window_display_history (w
, msg
, paused_p
)
374 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
376 buf
= redisplay_history
[history_idx
].trace
;
379 sprintf (buf
, "%d: window %p (`%s')%s\n",
382 ((BUFFERP (w
->buffer
)
383 && STRINGP (XBUFFER (w
->buffer
)->name
))
384 ? (char *) SDATA (XBUFFER (w
->buffer
)->name
)
386 paused_p
? " ***paused***" : "");
391 /* Add to the redisplay history that frame F has been displayed.
392 PAUSED_P non-zero means that the update has been interrupted for
396 add_frame_display_history (f
, paused_p
)
402 if (history_idx
>= REDISPLAY_HISTORY_SIZE
)
404 buf
= redisplay_history
[history_idx
].trace
;
407 sprintf (buf
, "%d: update frame %p%s",
409 f
, paused_p
? " ***paused***" : "");
413 DEFUN ("dump-redisplay-history", Fdump_redisplay_history
,
414 Sdump_redisplay_history
, 0, 0, "",
415 doc
: /* Dump redisplay history to stderr. */)
420 for (i
= history_idx
- 1; i
!= history_idx
; --i
)
423 i
= REDISPLAY_HISTORY_SIZE
- 1;
424 fprintf (stderr
, "%s\n", redisplay_history
[i
].trace
);
431 #else /* GLYPH_DEBUG == 0 */
433 #define WINDOW_TO_FRAME_VPOS(W, VPOS) ((VPOS) + WINDOW_TOP_EDGE_LINE (W))
434 #define WINDOW_TO_FRAME_HPOS(W, HPOS) ((HPOS) + WINDOW_LEFT_EDGE_COL (W))
436 #endif /* GLYPH_DEBUG == 0 */
440 /* FIXME: only used to find text start for profiling. */
443 safe_bcopy (const char *from
, char *to
, int size
)
449 /***********************************************************************
451 ***********************************************************************/
453 /* Allocate and return a glyph_matrix structure. POOL is the glyph
454 pool from which memory for the matrix should be allocated, or null
455 for window-based redisplay where no glyph pools are used. The
456 member `pool' of the glyph matrix structure returned is set to
457 POOL, the structure is otherwise zeroed. */
459 struct glyph_matrix
*
460 new_glyph_matrix (struct glyph_pool
*pool
)
462 struct glyph_matrix
*result
;
464 /* Allocate and clear. */
465 result
= (struct glyph_matrix
*) xmalloc (sizeof *result
);
466 memset (result
, 0, sizeof *result
);
468 /* Increment number of allocated matrices. This count is used
469 to detect memory leaks. */
470 ++glyph_matrix_count
;
472 /* Set pool and return. */
478 /* Free glyph matrix MATRIX. Passing in a null MATRIX is allowed.
480 The global counter glyph_matrix_count is decremented when a matrix
481 is freed. If the count gets negative, more structures were freed
482 than allocated, i.e. one matrix was freed more than once or a bogus
483 pointer was passed to this function.
485 If MATRIX->pool is null, this means that the matrix manages its own
486 glyph memory---this is done for matrices on X frames. Freeing the
487 matrix also frees the glyph memory in this case. */
490 free_glyph_matrix (struct glyph_matrix
*matrix
)
496 /* Detect the case that more matrices are freed than were
498 if (--glyph_matrix_count
< 0)
501 /* Free glyph memory if MATRIX owns it. */
502 if (matrix
->pool
== NULL
)
503 for (i
= 0; i
< matrix
->rows_allocated
; ++i
)
504 xfree (matrix
->rows
[i
].glyphs
[LEFT_MARGIN_AREA
]);
506 /* Free row structures and the matrix itself. */
507 xfree (matrix
->rows
);
513 /* Return the number of glyphs to reserve for a marginal area of
514 window W. TOTAL_GLYPHS is the number of glyphs in a complete
515 display line of window W. MARGIN gives the width of the marginal
516 area in canonical character units. MARGIN should be an integer
520 margin_glyphs_to_reserve (struct window
*w
, int total_glyphs
, Lisp_Object margin
)
524 if (NUMBERP (margin
))
526 int width
= XFASTINT (w
->total_cols
);
527 double d
= max (0, XFLOATINT (margin
));
528 d
= min (width
/ 2 - 1, d
);
529 n
= (int) ((double) total_glyphs
/ width
* d
);
538 /* Adjust glyph matrix MATRIX on window W or on a frame to changed
541 W is null if the function is called for a frame glyph matrix.
542 Otherwise it is the window MATRIX is a member of. X and Y are the
543 indices of the first column and row of MATRIX within the frame
544 matrix, if such a matrix exists. They are zero for purely
545 window-based redisplay. DIM is the needed size of the matrix.
547 In window-based redisplay, where no frame matrices exist, glyph
548 matrices manage their own glyph storage. Otherwise, they allocate
549 storage from a common frame glyph pool which can be found in
552 The reason for this memory management strategy is to avoid complete
553 frame redraws if possible. When we allocate from a common pool, a
554 change of the location or size of a sub-matrix within the pool
555 requires a complete redisplay of the frame because we cannot easily
556 make sure that the current matrices of all windows still agree with
557 what is displayed on the screen. While this is usually fast, it
558 leads to screen flickering. */
561 adjust_glyph_matrix (struct window
*w
, struct glyph_matrix
*matrix
, int x
, int y
, struct dim dim
)
565 int marginal_areas_changed_p
= 0;
566 int header_line_changed_p
= 0;
567 int header_line_p
= 0;
568 int left
= -1, right
= -1;
569 int window_width
= -1, window_height
= -1;
571 /* See if W had a header line that has disappeared now, or vice versa.
575 window_box (w
, -1, 0, 0, &window_width
, &window_height
);
577 header_line_p
= WINDOW_WANTS_HEADER_LINE_P (w
);
578 header_line_changed_p
= header_line_p
!= matrix
->header_line_p
;
580 matrix
->header_line_p
= header_line_p
;
582 /* If POOL is null, MATRIX is a window matrix for window-based redisplay.
583 Do nothing if MATRIX' size, position, vscroll, and marginal areas
584 haven't changed. This optimization is important because preserving
585 the matrix means preventing redisplay. */
586 if (matrix
->pool
== NULL
)
588 left
= margin_glyphs_to_reserve (w
, dim
.width
, w
->left_margin_cols
);
589 right
= margin_glyphs_to_reserve (w
, dim
.width
, w
->right_margin_cols
);
590 xassert (left
>= 0 && right
>= 0);
591 marginal_areas_changed_p
= (left
!= matrix
->left_margin_glyphs
592 || right
!= matrix
->right_margin_glyphs
);
594 if (!marginal_areas_changed_p
596 && !header_line_changed_p
597 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
598 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
599 && matrix
->window_height
== window_height
600 && matrix
->window_vscroll
== w
->vscroll
601 && matrix
->window_width
== window_width
)
605 /* Enlarge MATRIX->rows if necessary. New rows are cleared. */
606 if (matrix
->rows_allocated
< dim
.height
)
608 int size
= dim
.height
* sizeof (struct glyph_row
);
609 new_rows
= dim
.height
- matrix
->rows_allocated
;
610 matrix
->rows
= (struct glyph_row
*) xrealloc (matrix
->rows
, size
);
611 memset (matrix
->rows
+ matrix
->rows_allocated
, 0,
612 new_rows
* sizeof *matrix
->rows
);
613 matrix
->rows_allocated
= dim
.height
;
618 /* If POOL is not null, MATRIX is a frame matrix or a window matrix
619 on a frame not using window-based redisplay. Set up pointers for
620 each row into the glyph pool. */
623 xassert (matrix
->pool
->glyphs
);
627 left
= margin_glyphs_to_reserve (w
, dim
.width
,
628 w
->left_margin_cols
);
629 right
= margin_glyphs_to_reserve (w
, dim
.width
,
630 w
->right_margin_cols
);
635 for (i
= 0; i
< dim
.height
; ++i
)
637 struct glyph_row
*row
= &matrix
->rows
[i
];
639 row
->glyphs
[LEFT_MARGIN_AREA
]
640 = (matrix
->pool
->glyphs
641 + (y
+ i
) * matrix
->pool
->ncolumns
645 || row
== matrix
->rows
+ dim
.height
- 1
646 || (row
== matrix
->rows
&& matrix
->header_line_p
))
648 row
->glyphs
[TEXT_AREA
]
649 = row
->glyphs
[LEFT_MARGIN_AREA
];
650 row
->glyphs
[RIGHT_MARGIN_AREA
]
651 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
652 row
->glyphs
[LAST_AREA
]
653 = row
->glyphs
[RIGHT_MARGIN_AREA
];
657 row
->glyphs
[TEXT_AREA
]
658 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
659 row
->glyphs
[RIGHT_MARGIN_AREA
]
660 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
661 row
->glyphs
[LAST_AREA
]
662 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
666 matrix
->left_margin_glyphs
= left
;
667 matrix
->right_margin_glyphs
= right
;
671 /* If MATRIX->pool is null, MATRIX is responsible for managing
672 its own memory. It is a window matrix for window-based redisplay.
673 Allocate glyph memory from the heap. */
674 if (dim
.width
> matrix
->matrix_w
676 || header_line_changed_p
677 || marginal_areas_changed_p
)
679 struct glyph_row
*row
= matrix
->rows
;
680 struct glyph_row
*end
= row
+ matrix
->rows_allocated
;
684 row
->glyphs
[LEFT_MARGIN_AREA
]
685 = (struct glyph
*) xrealloc (row
->glyphs
[LEFT_MARGIN_AREA
],
687 * sizeof (struct glyph
)));
689 /* The mode line never has marginal areas. */
690 if (row
== matrix
->rows
+ dim
.height
- 1
691 || (row
== matrix
->rows
&& matrix
->header_line_p
))
693 row
->glyphs
[TEXT_AREA
]
694 = row
->glyphs
[LEFT_MARGIN_AREA
];
695 row
->glyphs
[RIGHT_MARGIN_AREA
]
696 = row
->glyphs
[TEXT_AREA
] + dim
.width
;
697 row
->glyphs
[LAST_AREA
]
698 = row
->glyphs
[RIGHT_MARGIN_AREA
];
702 row
->glyphs
[TEXT_AREA
]
703 = row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
704 row
->glyphs
[RIGHT_MARGIN_AREA
]
705 = row
->glyphs
[TEXT_AREA
] + dim
.width
- left
- right
;
706 row
->glyphs
[LAST_AREA
]
707 = row
->glyphs
[LEFT_MARGIN_AREA
] + dim
.width
;
713 xassert (left
>= 0 && right
>= 0);
714 matrix
->left_margin_glyphs
= left
;
715 matrix
->right_margin_glyphs
= right
;
718 /* Number of rows to be used by MATRIX. */
719 matrix
->nrows
= dim
.height
;
720 xassert (matrix
->nrows
>= 0);
724 if (matrix
== w
->current_matrix
)
726 /* Mark rows in a current matrix of a window as not having
727 valid contents. It's important to not do this for
728 desired matrices. When Emacs starts, it may already be
729 building desired matrices when this function runs. */
730 if (window_width
< 0)
731 window_width
= window_box_width (w
, -1);
733 /* Optimize the case that only the height has changed (C-x 2,
734 upper window). Invalidate all rows that are no longer part
736 if (!marginal_areas_changed_p
737 && !header_line_changed_p
739 && dim
.width
== matrix
->matrix_w
740 && matrix
->window_left_col
== WINDOW_LEFT_EDGE_COL (w
)
741 && matrix
->window_top_line
== WINDOW_TOP_EDGE_LINE (w
)
742 && matrix
->window_width
== window_width
)
744 /* Find the last row in the window. */
745 for (i
= 0; i
< matrix
->nrows
&& matrix
->rows
[i
].enabled_p
; ++i
)
746 if (MATRIX_ROW_BOTTOM_Y (matrix
->rows
+ i
) >= window_height
)
752 /* Window end is invalid, if inside of the rows that
753 are invalidated below. */
754 if (INTEGERP (w
->window_end_vpos
)
755 && XFASTINT (w
->window_end_vpos
) >= i
)
756 w
->window_end_valid
= Qnil
;
758 while (i
< matrix
->nrows
)
759 matrix
->rows
[i
++].enabled_p
= 0;
763 for (i
= 0; i
< matrix
->nrows
; ++i
)
764 matrix
->rows
[i
].enabled_p
= 0;
767 else if (matrix
== w
->desired_matrix
)
769 /* Rows in desired matrices always have to be cleared;
770 redisplay expects this is the case when it runs, so it
771 had better be the case when we adjust matrices between
773 for (i
= 0; i
< matrix
->nrows
; ++i
)
774 matrix
->rows
[i
].enabled_p
= 0;
779 /* Remember last values to be able to optimize frame redraws. */
780 matrix
->matrix_x
= x
;
781 matrix
->matrix_y
= y
;
782 matrix
->matrix_w
= dim
.width
;
783 matrix
->matrix_h
= dim
.height
;
785 /* Record the top y location and height of W at the time the matrix
786 was last adjusted. This is used to optimize redisplay above. */
789 matrix
->window_left_col
= WINDOW_LEFT_EDGE_COL (w
);
790 matrix
->window_top_line
= WINDOW_TOP_EDGE_LINE (w
);
791 matrix
->window_height
= window_height
;
792 matrix
->window_width
= window_width
;
793 matrix
->window_vscroll
= w
->vscroll
;
798 /* Reverse the contents of rows in MATRIX between START and END. The
799 contents of the row at END - 1 end up at START, END - 2 at START +
800 1 etc. This is part of the implementation of rotate_matrix (see
804 reverse_rows (struct glyph_matrix
*matrix
, int start
, int end
)
808 for (i
= start
, j
= end
- 1; i
< j
; ++i
, --j
)
810 /* Non-ISO HP/UX compiler doesn't like auto struct
812 struct glyph_row temp
;
813 temp
= matrix
->rows
[i
];
814 matrix
->rows
[i
] = matrix
->rows
[j
];
815 matrix
->rows
[j
] = temp
;
820 /* Rotate the contents of rows in MATRIX in the range FIRST .. LAST -
821 1 by BY positions. BY < 0 means rotate left, i.e. towards lower
822 indices. (Note: this does not copy glyphs, only glyph pointers in
823 row structures are moved around).
825 The algorithm used for rotating the vector was, I believe, first
826 described by Kernighan. See the vector R as consisting of two
827 sub-vectors AB, where A has length BY for BY >= 0. The result
828 after rotating is then BA. Reverse both sub-vectors to get ArBr
829 and reverse the result to get (ArBr)r which is BA. Similar for
833 rotate_matrix (struct glyph_matrix
*matrix
, int first
, int last
, int by
)
837 /* Up (rotate left, i.e. towards lower indices). */
839 reverse_rows (matrix
, first
, first
+ by
);
840 reverse_rows (matrix
, first
+ by
, last
);
841 reverse_rows (matrix
, first
, last
);
845 /* Down (rotate right, i.e. towards higher indices). */
846 reverse_rows (matrix
, last
- by
, last
);
847 reverse_rows (matrix
, first
, last
- by
);
848 reverse_rows (matrix
, first
, last
);
853 /* Increment buffer positions in glyph rows of MATRIX. Do it for rows
854 with indices START <= index < END. Increment positions by DELTA/
858 increment_matrix_positions (struct glyph_matrix
*matrix
, int start
, int end
, int delta
, int delta_bytes
)
860 /* Check that START and END are reasonable values. */
861 xassert (start
>= 0 && start
<= matrix
->nrows
);
862 xassert (end
>= 0 && end
<= matrix
->nrows
);
863 xassert (start
<= end
);
865 for (; start
< end
; ++start
)
866 increment_row_positions (matrix
->rows
+ start
, delta
, delta_bytes
);
870 /* Enable a range of rows in glyph matrix MATRIX. START and END are
871 the row indices of the first and last + 1 row to enable. If
872 ENABLED_P is non-zero, enabled_p flags in rows will be set to 1. */
875 enable_glyph_matrix_rows (struct glyph_matrix
*matrix
, int start
, int end
, int enabled_p
)
877 xassert (start
<= end
);
878 xassert (start
>= 0 && start
< matrix
->nrows
);
879 xassert (end
>= 0 && end
<= matrix
->nrows
);
881 for (; start
< end
; ++start
)
882 matrix
->rows
[start
].enabled_p
= enabled_p
!= 0;
888 This empties all rows in MATRIX by setting the enabled_p flag for
889 all rows of the matrix to zero. The function prepare_desired_row
890 will eventually really clear a row when it sees one with a zero
893 Resets update hints to defaults value. The only update hint
894 currently present is the flag MATRIX->no_scrolling_p. */
897 clear_glyph_matrix (struct glyph_matrix
*matrix
)
901 enable_glyph_matrix_rows (matrix
, 0, matrix
->nrows
, 0);
902 matrix
->no_scrolling_p
= 0;
907 /* Shift part of the glyph matrix MATRIX of window W up or down.
908 Increment y-positions in glyph rows between START and END by DY,
909 and recompute their visible height. */
912 shift_glyph_matrix (struct window
*w
, struct glyph_matrix
*matrix
, int start
, int end
, int dy
)
916 xassert (start
<= end
);
917 xassert (start
>= 0 && start
< matrix
->nrows
);
918 xassert (end
>= 0 && end
<= matrix
->nrows
);
920 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
921 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
923 for (; start
< end
; ++start
)
925 struct glyph_row
*row
= &matrix
->rows
[start
];
928 row
->visible_height
= row
->height
;
931 row
->visible_height
-= min_y
- row
->y
;
932 if (row
->y
+ row
->height
> max_y
)
933 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
938 /* Mark all rows in current matrices of frame F as invalid. Marking
939 invalid is done by setting enabled_p to zero for all rows in a
943 clear_current_matrices (register struct frame
*f
)
945 /* Clear frame current matrix, if we have one. */
946 if (f
->current_matrix
)
947 clear_glyph_matrix (f
->current_matrix
);
949 /* Clear the matrix of the menu bar window, if such a window exists.
950 The menu bar window is currently used to display menus on X when
951 no toolkit support is compiled in. */
952 if (WINDOWP (f
->menu_bar_window
))
953 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->current_matrix
);
955 /* Clear the matrix of the tool-bar window, if any. */
956 if (WINDOWP (f
->tool_bar_window
))
957 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->current_matrix
);
959 /* Clear current window matrices. */
960 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
961 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 0);
965 /* Clear out all display lines of F for a coming redisplay. */
968 clear_desired_matrices (register struct frame
*f
)
970 if (f
->desired_matrix
)
971 clear_glyph_matrix (f
->desired_matrix
);
973 if (WINDOWP (f
->menu_bar_window
))
974 clear_glyph_matrix (XWINDOW (f
->menu_bar_window
)->desired_matrix
);
976 if (WINDOWP (f
->tool_bar_window
))
977 clear_glyph_matrix (XWINDOW (f
->tool_bar_window
)->desired_matrix
);
979 /* Do it for window matrices. */
980 xassert (WINDOWP (FRAME_ROOT_WINDOW (f
)));
981 clear_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
985 /* Clear matrices in window tree rooted in W. If DESIRED_P is
986 non-zero clear desired matrices, otherwise clear current matrices. */
989 clear_window_matrices (struct window
*w
, int desired_p
)
993 if (!NILP (w
->hchild
))
995 xassert (WINDOWP (w
->hchild
));
996 clear_window_matrices (XWINDOW (w
->hchild
), desired_p
);
998 else if (!NILP (w
->vchild
))
1000 xassert (WINDOWP (w
->vchild
));
1001 clear_window_matrices (XWINDOW (w
->vchild
), desired_p
);
1006 clear_glyph_matrix (w
->desired_matrix
);
1009 clear_glyph_matrix (w
->current_matrix
);
1010 w
->window_end_valid
= Qnil
;
1014 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
1020 /***********************************************************************
1023 See dispextern.h for an overall explanation of glyph rows.
1024 ***********************************************************************/
1026 /* Clear glyph row ROW. Do it in a way that makes it robust against
1027 changes in the glyph_row structure, i.e. addition or removal of
1028 structure members. */
1030 static struct glyph_row null_row
;
1033 clear_glyph_row (struct glyph_row
*row
)
1035 struct glyph
*p
[1 + LAST_AREA
];
1037 /* Save pointers. */
1038 p
[LEFT_MARGIN_AREA
] = row
->glyphs
[LEFT_MARGIN_AREA
];
1039 p
[TEXT_AREA
] = row
->glyphs
[TEXT_AREA
];
1040 p
[RIGHT_MARGIN_AREA
] = row
->glyphs
[RIGHT_MARGIN_AREA
];
1041 p
[LAST_AREA
] = row
->glyphs
[LAST_AREA
];
1046 /* Restore pointers. */
1047 row
->glyphs
[LEFT_MARGIN_AREA
] = p
[LEFT_MARGIN_AREA
];
1048 row
->glyphs
[TEXT_AREA
] = p
[TEXT_AREA
];
1049 row
->glyphs
[RIGHT_MARGIN_AREA
] = p
[RIGHT_MARGIN_AREA
];
1050 row
->glyphs
[LAST_AREA
] = p
[LAST_AREA
];
1052 #if 0 /* At some point, some bit-fields of struct glyph were not set,
1053 which made glyphs unequal when compared with GLYPH_EQUAL_P.
1054 Redisplay outputs such glyphs, and flickering effects were
1055 the result. This also depended on the contents of memory
1056 returned by xmalloc. If flickering happens again, activate
1057 the code below. If the flickering is gone with that, chances
1058 are that the flickering has the same reason as here. */
1059 memset (p
[0], 0, (char *) p
[LAST_AREA
] - (char *) p
[0]);
1064 /* Make ROW an empty, enabled row of canonical character height,
1065 in window W starting at y-position Y. */
1068 blank_row (struct window
*w
, struct glyph_row
*row
, int y
)
1072 min_y
= WINDOW_HEADER_LINE_HEIGHT (w
);
1073 max_y
= WINDOW_BOX_HEIGHT_NO_MODE_LINE (w
);
1075 clear_glyph_row (row
);
1077 row
->ascent
= row
->phys_ascent
= 0;
1078 row
->height
= row
->phys_height
= FRAME_LINE_HEIGHT (XFRAME (w
->frame
));
1079 row
->visible_height
= row
->height
;
1082 row
->visible_height
-= min_y
- row
->y
;
1083 if (row
->y
+ row
->height
> max_y
)
1084 row
->visible_height
-= row
->y
+ row
->height
- max_y
;
1090 /* Increment buffer positions in glyph row ROW. DELTA and DELTA_BYTES
1091 are the amounts by which to change positions. Note that the first
1092 glyph of the text area of a row can have a buffer position even if
1093 the used count of the text area is zero. Such rows display line
1097 increment_row_positions (struct glyph_row
*row
, int delta
, int delta_bytes
)
1101 /* Increment start and end positions. */
1102 MATRIX_ROW_START_CHARPOS (row
) += delta
;
1103 MATRIX_ROW_START_BYTEPOS (row
) += delta_bytes
;
1104 MATRIX_ROW_END_CHARPOS (row
) += delta
;
1105 MATRIX_ROW_END_BYTEPOS (row
) += delta_bytes
;
1106 CHARPOS (row
->start
.pos
) += delta
;
1107 BYTEPOS (row
->start
.pos
) += delta_bytes
;
1108 CHARPOS (row
->end
.pos
) += delta
;
1109 BYTEPOS (row
->end
.pos
) += delta_bytes
;
1111 if (!row
->enabled_p
)
1114 /* Increment positions in glyphs. */
1115 for (area
= 0; area
< LAST_AREA
; ++area
)
1116 for (i
= 0; i
< row
->used
[area
]; ++i
)
1117 if (BUFFERP (row
->glyphs
[area
][i
].object
)
1118 && row
->glyphs
[area
][i
].charpos
> 0)
1119 row
->glyphs
[area
][i
].charpos
+= delta
;
1121 /* Capture the case of rows displaying a line end. */
1122 if (row
->used
[TEXT_AREA
] == 0
1123 && MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1124 row
->glyphs
[TEXT_AREA
]->charpos
+= delta
;
1129 /* Swap glyphs between two glyph rows A and B. This exchanges glyph
1130 contents, i.e. glyph structure contents are exchanged between A and
1131 B without changing glyph pointers in A and B. */
1134 swap_glyphs_in_rows (a
, b
)
1135 struct glyph_row
*a
, *b
;
1139 for (area
= 0; area
< LAST_AREA
; ++area
)
1141 /* Number of glyphs to swap. */
1142 int max_used
= max (a
->used
[area
], b
->used
[area
]);
1144 /* Start of glyphs in area of row A. */
1145 struct glyph
*glyph_a
= a
->glyphs
[area
];
1147 /* End + 1 of glyphs in area of row A. */
1148 struct glyph
*glyph_a_end
= a
->glyphs
[max_used
];
1150 /* Start of glyphs in area of row B. */
1151 struct glyph
*glyph_b
= b
->glyphs
[area
];
1153 while (glyph_a
< glyph_a_end
)
1155 /* Non-ISO HP/UX compiler doesn't like auto struct
1159 *glyph_a
= *glyph_b
;
1169 /* Exchange pointers to glyph memory between glyph rows A and B. */
1172 swap_glyph_pointers (struct glyph_row
*a
, struct glyph_row
*b
)
1175 for (i
= 0; i
< LAST_AREA
+ 1; ++i
)
1177 struct glyph
*temp
= a
->glyphs
[i
];
1178 a
->glyphs
[i
] = b
->glyphs
[i
];
1179 b
->glyphs
[i
] = temp
;
1184 /* Copy glyph row structure FROM to glyph row structure TO, except
1185 that glyph pointers in the structures are left unchanged. */
1188 copy_row_except_pointers (struct glyph_row
*to
, struct glyph_row
*from
)
1190 struct glyph
*pointers
[1 + LAST_AREA
];
1192 /* Save glyph pointers of TO. */
1193 memcpy (pointers
, to
->glyphs
, sizeof to
->glyphs
);
1195 /* Do a structure assignment. */
1198 /* Restore original pointers of TO. */
1199 memcpy (to
->glyphs
, pointers
, sizeof to
->glyphs
);
1203 /* Copy contents of glyph row FROM to glyph row TO. Glyph pointers in
1204 TO and FROM are left unchanged. Glyph contents are copied from the
1205 glyph memory of FROM to the glyph memory of TO. Increment buffer
1206 positions in row TO by DELTA/ DELTA_BYTES. */
1209 copy_glyph_row_contents (struct glyph_row
*to
, struct glyph_row
*from
, int delta
, int delta_bytes
)
1213 /* This is like a structure assignment TO = FROM, except that
1214 glyph pointers in the rows are left unchanged. */
1215 copy_row_except_pointers (to
, from
);
1217 /* Copy glyphs from FROM to TO. */
1218 for (area
= 0; area
< LAST_AREA
; ++area
)
1219 if (from
->used
[area
])
1220 memcpy (to
->glyphs
[area
], from
->glyphs
[area
],
1221 from
->used
[area
] * sizeof (struct glyph
));
1223 /* Increment buffer positions in TO by DELTA. */
1224 increment_row_positions (to
, delta
, delta_bytes
);
1228 /* Assign glyph row FROM to glyph row TO. This works like a structure
1229 assignment TO = FROM, except that glyph pointers are not copied but
1230 exchanged between TO and FROM. Pointers must be exchanged to avoid
1234 assign_row (struct glyph_row
*to
, struct glyph_row
*from
)
1236 swap_glyph_pointers (to
, from
);
1237 copy_row_except_pointers (to
, from
);
1241 /* Test whether the glyph memory of the glyph row WINDOW_ROW, which is
1242 a row in a window matrix, is a slice of the glyph memory of the
1243 glyph row FRAME_ROW which is a row in a frame glyph matrix. Value
1244 is non-zero if the glyph memory of WINDOW_ROW is part of the glyph
1245 memory of FRAME_ROW. */
1250 glyph_row_slice_p (window_row
, frame_row
)
1251 struct glyph_row
*window_row
, *frame_row
;
1253 struct glyph
*window_glyph_start
= window_row
->glyphs
[0];
1254 struct glyph
*frame_glyph_start
= frame_row
->glyphs
[0];
1255 struct glyph
*frame_glyph_end
= frame_row
->glyphs
[LAST_AREA
];
1257 return (frame_glyph_start
<= window_glyph_start
1258 && window_glyph_start
< frame_glyph_end
);
1261 #endif /* GLYPH_DEBUG */
1265 /* Find the row in the window glyph matrix WINDOW_MATRIX being a slice
1266 of ROW in the frame matrix FRAME_MATRIX. Value is null if no row
1267 in WINDOW_MATRIX is found satisfying the condition. */
1269 static struct glyph_row
*
1270 find_glyph_row_slice (window_matrix
, frame_matrix
, row
)
1271 struct glyph_matrix
*window_matrix
, *frame_matrix
;
1276 xassert (row
>= 0 && row
< frame_matrix
->nrows
);
1278 for (i
= 0; i
< window_matrix
->nrows
; ++i
)
1279 if (glyph_row_slice_p (window_matrix
->rows
+ i
,
1280 frame_matrix
->rows
+ row
))
1283 return i
< window_matrix
->nrows
? window_matrix
->rows
+ i
: 0;
1288 /* Prepare ROW for display. Desired rows are cleared lazily,
1289 i.e. they are only marked as to be cleared by setting their
1290 enabled_p flag to zero. When a row is to be displayed, a prior
1291 call to this function really clears it. */
1294 prepare_desired_row (struct glyph_row
*row
)
1296 if (!row
->enabled_p
)
1298 unsigned rp
= row
->reversed_p
;
1300 clear_glyph_row (row
);
1302 row
->reversed_p
= rp
;
1307 /* Return a hash code for glyph row ROW. */
1310 line_hash_code (struct glyph_row
*row
)
1316 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
1317 struct glyph
*end
= glyph
+ row
->used
[TEXT_AREA
];
1321 int c
= glyph
->u
.ch
;
1322 int face_id
= glyph
->face_id
;
1323 if (FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1325 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + c
;
1326 hash
= (((hash
<< 4) + (hash
>> 24)) & 0x0fffffff) + face_id
;
1338 /* Return the cost of drawing line VPOS in MATRIX. The cost equals
1339 the number of characters in the line. If must_write_spaces is
1340 zero, leading and trailing spaces are ignored. */
1343 line_draw_cost (struct glyph_matrix
*matrix
, int vpos
)
1345 struct glyph_row
*row
= matrix
->rows
+ vpos
;
1346 struct glyph
*beg
= row
->glyphs
[TEXT_AREA
];
1347 struct glyph
*end
= beg
+ row
->used
[TEXT_AREA
];
1349 Lisp_Object
*glyph_table_base
= GLYPH_TABLE_BASE
;
1350 int glyph_table_len
= GLYPH_TABLE_LENGTH
;
1352 /* Ignore trailing and leading spaces if we can. */
1353 if (!FRAME_MUST_WRITE_SPACES (SELECTED_FRAME ())) /* XXX Is SELECTED_FRAME OK here? */
1355 /* Skip from the end over trailing spaces. */
1356 while (end
> beg
&& CHAR_GLYPH_SPACE_P (*(end
- 1)))
1359 /* All blank line. */
1363 /* Skip over leading spaces. */
1364 while (CHAR_GLYPH_SPACE_P (*beg
))
1368 /* If we don't have a glyph-table, each glyph is one character,
1369 so return the number of glyphs. */
1370 if (glyph_table_base
== 0)
1374 /* Otherwise, scan the glyphs and accumulate their total length
1381 SET_GLYPH_FROM_CHAR_GLYPH (g
, *beg
);
1383 if (GLYPH_INVALID_P (g
)
1384 || GLYPH_SIMPLE_P (glyph_table_base
, glyph_table_len
, g
))
1387 len
+= GLYPH_LENGTH (glyph_table_base
, g
);
1397 /* Test two glyph rows A and B for equality. Value is non-zero if A
1398 and B have equal contents. W is the window to which the glyphs
1399 rows A and B belong. It is needed here to test for partial row
1400 visibility. MOUSE_FACE_P non-zero means compare the mouse_face_p
1401 flags of A and B, too. */
1404 row_equal_p (struct window
*w
, struct glyph_row
*a
, struct glyph_row
*b
, int mouse_face_p
)
1408 else if (a
->hash
!= b
->hash
)
1412 struct glyph
*a_glyph
, *b_glyph
, *a_end
;
1415 if (mouse_face_p
&& a
->mouse_face_p
!= b
->mouse_face_p
)
1418 /* Compare glyphs. */
1419 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
1421 if (a
->used
[area
] != b
->used
[area
])
1424 a_glyph
= a
->glyphs
[area
];
1425 a_end
= a_glyph
+ a
->used
[area
];
1426 b_glyph
= b
->glyphs
[area
];
1428 while (a_glyph
< a_end
1429 && GLYPH_EQUAL_P (a_glyph
, b_glyph
))
1430 ++a_glyph
, ++b_glyph
;
1432 if (a_glyph
!= a_end
)
1436 if (a
->fill_line_p
!= b
->fill_line_p
1437 || a
->cursor_in_fringe_p
!= b
->cursor_in_fringe_p
1438 || a
->left_fringe_bitmap
!= b
->left_fringe_bitmap
1439 || a
->left_fringe_face_id
!= b
->left_fringe_face_id
1440 || a
->right_fringe_bitmap
!= b
->right_fringe_bitmap
1441 || a
->right_fringe_face_id
!= b
->right_fringe_face_id
1442 || a
->overlay_arrow_bitmap
!= b
->overlay_arrow_bitmap
1443 || a
->exact_window_width_line_p
!= b
->exact_window_width_line_p
1444 || a
->overlapped_p
!= b
->overlapped_p
1445 || (MATRIX_ROW_CONTINUATION_LINE_P (a
)
1446 != MATRIX_ROW_CONTINUATION_LINE_P (b
))
1447 || a
->reversed_p
!= b
->reversed_p
1448 /* Different partially visible characters on left margin. */
1450 /* Different height. */
1451 || a
->ascent
!= b
->ascent
1452 || a
->phys_ascent
!= b
->phys_ascent
1453 || a
->phys_height
!= b
->phys_height
1454 || a
->visible_height
!= b
->visible_height
)
1463 /***********************************************************************
1466 See dispextern.h for an overall explanation of glyph pools.
1467 ***********************************************************************/
1469 /* Allocate a glyph_pool structure. The structure returned is
1470 initialized with zeros. The global variable glyph_pool_count is
1471 incremented for each pool allocated. */
1473 static struct glyph_pool
*
1474 new_glyph_pool (void)
1476 struct glyph_pool
*result
;
1478 /* Allocate a new glyph_pool and clear it. */
1479 result
= (struct glyph_pool
*) xmalloc (sizeof *result
);
1480 memset (result
, 0, sizeof *result
);
1482 /* For memory leak and double deletion checking. */
1489 /* Free a glyph_pool structure POOL. The function may be called with
1490 a null POOL pointer. The global variable glyph_pool_count is
1491 decremented with every pool structure freed. If this count gets
1492 negative, more structures were freed than allocated, i.e. one
1493 structure must have been freed more than once or a bogus pointer
1494 was passed to free_glyph_pool. */
1497 free_glyph_pool (struct glyph_pool
*pool
)
1501 /* More freed than allocated? */
1503 xassert (glyph_pool_count
>= 0);
1505 xfree (pool
->glyphs
);
1511 /* Enlarge a glyph pool POOL. MATRIX_DIM gives the number of rows and
1512 columns we need. This function never shrinks a pool. The only
1513 case in which this would make sense, would be when a frame's size
1514 is changed from a large value to a smaller one. But, if someone
1515 does it once, we can expect that he will do it again.
1517 Value is non-zero if the pool changed in a way which makes
1518 re-adjusting window glyph matrices necessary. */
1521 realloc_glyph_pool (struct glyph_pool
*pool
, struct dim matrix_dim
)
1526 changed_p
= (pool
->glyphs
== 0
1527 || matrix_dim
.height
!= pool
->nrows
1528 || matrix_dim
.width
!= pool
->ncolumns
);
1530 /* Enlarge the glyph pool. */
1531 needed
= matrix_dim
.width
* matrix_dim
.height
;
1532 if (needed
> pool
->nglyphs
)
1534 int size
= needed
* sizeof (struct glyph
);
1537 pool
->glyphs
= (struct glyph
*) xrealloc (pool
->glyphs
, size
);
1540 pool
->glyphs
= (struct glyph
*) xmalloc (size
);
1541 memset (pool
->glyphs
, 0, size
);
1544 pool
->nglyphs
= needed
;
1547 /* Remember the number of rows and columns because (a) we use them
1548 to do sanity checks, and (b) the number of columns determines
1549 where rows in the frame matrix start---this must be available to
1550 determine pointers to rows of window sub-matrices. */
1551 pool
->nrows
= matrix_dim
.height
;
1552 pool
->ncolumns
= matrix_dim
.width
;
1559 /***********************************************************************
1561 ***********************************************************************/
1566 /* Flush standard output. This is sometimes useful to call from the debugger.
1567 XXX Maybe this should be changed to flush the current terminal instead of
1578 /* Check that no glyph pointers have been lost in MATRIX. If a
1579 pointer has been lost, e.g. by using a structure assignment between
1580 rows, at least one pointer must occur more than once in the rows of
1584 check_matrix_pointer_lossage (matrix
)
1585 struct glyph_matrix
*matrix
;
1589 for (i
= 0; i
< matrix
->nrows
; ++i
)
1590 for (j
= 0; j
< matrix
->nrows
; ++j
)
1592 || (matrix
->rows
[i
].glyphs
[TEXT_AREA
]
1593 != matrix
->rows
[j
].glyphs
[TEXT_AREA
]));
1597 /* Get a pointer to glyph row ROW in MATRIX, with bounds checks. */
1600 matrix_row (matrix
, row
)
1601 struct glyph_matrix
*matrix
;
1604 xassert (matrix
&& matrix
->rows
);
1605 xassert (row
>= 0 && row
< matrix
->nrows
);
1607 /* That's really too slow for normal testing because this function
1608 is called almost everywhere. Although---it's still astonishingly
1609 fast, so it is valuable to have for debugging purposes. */
1611 check_matrix_pointer_lossage (matrix
);
1614 return matrix
->rows
+ row
;
1618 #if 0 /* This function makes invalid assumptions when text is
1619 partially invisible. But it might come handy for debugging
1622 /* Check invariants that must hold for an up to date current matrix of
1626 check_matrix_invariants (w
)
1629 struct glyph_matrix
*matrix
= w
->current_matrix
;
1630 int yb
= window_text_bottom_y (w
);
1631 struct glyph_row
*row
= matrix
->rows
;
1632 struct glyph_row
*last_text_row
= NULL
;
1633 struct buffer
*saved
= current_buffer
;
1634 struct buffer
*buffer
= XBUFFER (w
->buffer
);
1637 /* This can sometimes happen for a fresh window. */
1638 if (matrix
->nrows
< 2)
1641 set_buffer_temp (buffer
);
1643 /* Note: last row is always reserved for the mode line. */
1644 while (MATRIX_ROW_DISPLAYS_TEXT_P (row
)
1645 && MATRIX_ROW_BOTTOM_Y (row
) < yb
)
1647 struct glyph_row
*next
= row
+ 1;
1649 if (MATRIX_ROW_DISPLAYS_TEXT_P (row
))
1650 last_text_row
= row
;
1652 /* Check that character and byte positions are in sync. */
1653 xassert (MATRIX_ROW_START_BYTEPOS (row
)
1654 == CHAR_TO_BYTE (MATRIX_ROW_START_CHARPOS (row
)));
1655 xassert (BYTEPOS (row
->start
.pos
)
1656 == CHAR_TO_BYTE (CHARPOS (row
->start
.pos
)));
1658 /* CHAR_TO_BYTE aborts when invoked for a position > Z. We can
1659 have such a position temporarily in case of a minibuffer
1660 displaying something like `[Sole completion]' at its end. */
1661 if (MATRIX_ROW_END_CHARPOS (row
) < BUF_ZV (current_buffer
))
1663 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1664 == CHAR_TO_BYTE (MATRIX_ROW_END_CHARPOS (row
)));
1665 xassert (BYTEPOS (row
->end
.pos
)
1666 == CHAR_TO_BYTE (CHARPOS (row
->end
.pos
)));
1669 /* Check that end position of `row' is equal to start position
1671 if (next
->enabled_p
&& MATRIX_ROW_DISPLAYS_TEXT_P (next
))
1673 xassert (MATRIX_ROW_END_CHARPOS (row
)
1674 == MATRIX_ROW_START_CHARPOS (next
));
1675 xassert (MATRIX_ROW_END_BYTEPOS (row
)
1676 == MATRIX_ROW_START_BYTEPOS (next
));
1677 xassert (CHARPOS (row
->end
.pos
) == CHARPOS (next
->start
.pos
));
1678 xassert (BYTEPOS (row
->end
.pos
) == BYTEPOS (next
->start
.pos
));
1683 xassert (w
->current_matrix
->nrows
== w
->desired_matrix
->nrows
);
1684 xassert (w
->desired_matrix
->rows
!= NULL
);
1685 set_buffer_temp (saved
);
1690 #endif /* GLYPH_DEBUG != 0 */
1694 /**********************************************************************
1695 Allocating/ Adjusting Glyph Matrices
1696 **********************************************************************/
1698 /* Allocate glyph matrices over a window tree for a frame-based
1701 X and Y are column/row within the frame glyph matrix where
1702 sub-matrices for the window tree rooted at WINDOW must be
1703 allocated. DIM_ONLY_P non-zero means that the caller of this
1704 function is only interested in the result matrix dimension, and
1705 matrix adjustments should not be performed.
1707 The function returns the total width/height of the sub-matrices of
1708 the window tree. If called on a frame root window, the computation
1709 will take the mini-buffer window into account.
1711 *WINDOW_CHANGE_FLAGS is set to a bit mask with bits
1713 NEW_LEAF_MATRIX set if any window in the tree did not have a
1714 glyph matrices yet, and
1716 CHANGED_LEAF_MATRIX set if the dimension or location of a matrix of
1717 any window in the tree will be changed or have been changed (see
1720 *WINDOW_CHANGE_FLAGS must be initialized by the caller of this
1723 Windows are arranged into chains of windows on the same level
1724 through the next fields of window structures. Such a level can be
1725 either a sequence of horizontally adjacent windows from left to
1726 right, or a sequence of vertically adjacent windows from top to
1727 bottom. Each window in a horizontal sequence can be either a leaf
1728 window or a vertical sequence; a window in a vertical sequence can
1729 be either a leaf or a horizontal sequence. All windows in a
1730 horizontal sequence have the same height, and all windows in a
1731 vertical sequence have the same width.
1733 This function uses, for historical reasons, a more general
1734 algorithm to determine glyph matrix dimensions that would be
1737 The matrix height of a horizontal sequence is determined by the
1738 maximum height of any matrix in the sequence. The matrix width of
1739 a horizontal sequence is computed by adding up matrix widths of
1740 windows in the sequence.
1742 |<------- result width ------->|
1743 +---------+----------+---------+ ---
1746 +---------+ | | result height
1751 The matrix width of a vertical sequence is the maximum matrix width
1752 of any window in the sequence. Its height is computed by adding up
1753 matrix heights of windows in the sequence.
1755 |<---- result width -->|
1763 +------------+---------+ |
1766 +------------+---------+ --- */
1768 /* Bit indicating that a new matrix will be allocated or has been
1771 #define NEW_LEAF_MATRIX (1 << 0)
1773 /* Bit indicating that a matrix will or has changed its location or
1776 #define CHANGED_LEAF_MATRIX (1 << 1)
1779 allocate_matrices_for_frame_redisplay (window
, x
, y
, dim_only_p
,
1780 window_change_flags
)
1784 int *window_change_flags
;
1786 struct frame
*f
= XFRAME (WINDOW_FRAME (XWINDOW (window
)));
1788 int wmax
= 0, hmax
= 0;
1792 int in_horz_combination_p
;
1794 /* What combination is WINDOW part of? Compute this once since the
1795 result is the same for all windows in the `next' chain. The
1796 special case of a root window (parent equal to nil) is treated
1797 like a vertical combination because a root window's `next'
1798 points to the mini-buffer window, if any, which is arranged
1799 vertically below other windows. */
1800 in_horz_combination_p
1801 = (!NILP (XWINDOW (window
)->parent
)
1802 && !NILP (XWINDOW (XWINDOW (window
)->parent
)->hchild
));
1804 /* For WINDOW and all windows on the same level. */
1807 w
= XWINDOW (window
);
1809 /* Get the dimension of the window sub-matrix for W, depending
1810 on whether this is a combination or a leaf window. */
1811 if (!NILP (w
->hchild
))
1812 dim
= allocate_matrices_for_frame_redisplay (w
->hchild
, x
, y
,
1814 window_change_flags
);
1815 else if (!NILP (w
->vchild
))
1816 dim
= allocate_matrices_for_frame_redisplay (w
->vchild
, x
, y
,
1818 window_change_flags
);
1821 /* If not already done, allocate sub-matrix structures. */
1822 if (w
->desired_matrix
== NULL
)
1824 w
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
1825 w
->current_matrix
= new_glyph_matrix (f
->current_pool
);
1826 *window_change_flags
|= NEW_LEAF_MATRIX
;
1829 /* Width and height MUST be chosen so that there are no
1830 holes in the frame matrix. */
1831 dim
.width
= required_matrix_width (w
);
1832 dim
.height
= required_matrix_height (w
);
1834 /* Will matrix be re-allocated? */
1835 if (x
!= w
->desired_matrix
->matrix_x
1836 || y
!= w
->desired_matrix
->matrix_y
1837 || dim
.width
!= w
->desired_matrix
->matrix_w
1838 || dim
.height
!= w
->desired_matrix
->matrix_h
1839 || (margin_glyphs_to_reserve (w
, dim
.width
,
1840 w
->left_margin_cols
)
1841 != w
->desired_matrix
->left_margin_glyphs
)
1842 || (margin_glyphs_to_reserve (w
, dim
.width
,
1843 w
->right_margin_cols
)
1844 != w
->desired_matrix
->right_margin_glyphs
))
1845 *window_change_flags
|= CHANGED_LEAF_MATRIX
;
1847 /* Actually change matrices, if allowed. Do not consider
1848 CHANGED_LEAF_MATRIX computed above here because the pool
1849 may have been changed which we don't now here. We trust
1850 that we only will be called with DIM_ONLY_P != 0 when
1854 adjust_glyph_matrix (w
, w
->desired_matrix
, x
, y
, dim
);
1855 adjust_glyph_matrix (w
, w
->current_matrix
, x
, y
, dim
);
1859 /* If we are part of a horizontal combination, advance x for
1860 windows to the right of W; otherwise advance y for windows
1862 if (in_horz_combination_p
)
1867 /* Remember maximum glyph matrix dimensions. */
1868 wmax
= max (wmax
, dim
.width
);
1869 hmax
= max (hmax
, dim
.height
);
1871 /* Next window on same level. */
1874 while (!NILP (window
));
1876 /* Set `total' to the total glyph matrix dimension of this window
1877 level. In a vertical combination, the width is the width of the
1878 widest window; the height is the y we finally reached, corrected
1879 by the y we started with. In a horizontal combination, the total
1880 height is the height of the tallest window, and the width is the
1881 x we finally reached, corrected by the x we started with. */
1882 if (in_horz_combination_p
)
1884 total
.width
= x
- x0
;
1885 total
.height
= hmax
;
1890 total
.height
= y
- y0
;
1897 /* Return the required height of glyph matrices for window W. */
1900 required_matrix_height (struct window
*w
)
1902 #ifdef HAVE_WINDOW_SYSTEM
1903 struct frame
*f
= XFRAME (w
->frame
);
1905 if (FRAME_WINDOW_P (f
))
1907 int ch_height
= FRAME_SMALLEST_FONT_HEIGHT (f
);
1908 int window_pixel_height
= window_box_height (w
) + eabs (w
->vscroll
);
1909 return (((window_pixel_height
+ ch_height
- 1)
1910 / ch_height
) * w
->nrows_scale_factor
1911 /* One partially visible line at the top and
1912 bottom of the window. */
1914 /* 2 for header and mode line. */
1917 #endif /* HAVE_WINDOW_SYSTEM */
1919 return WINDOW_TOTAL_LINES (w
);
1923 /* Return the required width of glyph matrices for window W. */
1926 required_matrix_width (struct window
*w
)
1928 #ifdef HAVE_WINDOW_SYSTEM
1929 struct frame
*f
= XFRAME (w
->frame
);
1930 if (FRAME_WINDOW_P (f
))
1932 int ch_width
= FRAME_SMALLEST_CHAR_WIDTH (f
);
1933 int window_pixel_width
= WINDOW_TOTAL_WIDTH (w
);
1935 /* Compute number of glyphs needed in a glyph row. */
1936 return (((window_pixel_width
+ ch_width
- 1)
1937 / ch_width
) * w
->ncols_scale_factor
1938 /* 2 partially visible columns in the text area. */
1940 /* One partially visible column at the right
1941 edge of each marginal area. */
1944 #endif /* HAVE_WINDOW_SYSTEM */
1946 return XINT (w
->total_cols
);
1950 /* Allocate window matrices for window-based redisplay. W is the
1951 window whose matrices must be allocated/reallocated. */
1954 allocate_matrices_for_window_redisplay (struct window
*w
)
1958 if (!NILP (w
->vchild
))
1959 allocate_matrices_for_window_redisplay (XWINDOW (w
->vchild
));
1960 else if (!NILP (w
->hchild
))
1961 allocate_matrices_for_window_redisplay (XWINDOW (w
->hchild
));
1964 /* W is a leaf window. */
1967 /* If matrices are not yet allocated, allocate them now. */
1968 if (w
->desired_matrix
== NULL
)
1970 w
->desired_matrix
= new_glyph_matrix (NULL
);
1971 w
->current_matrix
= new_glyph_matrix (NULL
);
1974 dim
.width
= required_matrix_width (w
);
1975 dim
.height
= required_matrix_height (w
);
1976 adjust_glyph_matrix (w
, w
->desired_matrix
, 0, 0, dim
);
1977 adjust_glyph_matrix (w
, w
->current_matrix
, 0, 0, dim
);
1980 w
= NILP (w
->next
) ? NULL
: XWINDOW (w
->next
);
1985 /* Re-allocate/ re-compute glyph matrices on frame F. If F is null,
1986 do it for all frames; otherwise do it just for the given frame.
1987 This function must be called when a new frame is created, its size
1988 changes, or its window configuration changes. */
1991 adjust_glyphs (struct frame
*f
)
1993 /* Block input so that expose events and other events that access
1994 glyph matrices are not processed while we are changing them. */
1998 adjust_frame_glyphs (f
);
2001 Lisp_Object tail
, lisp_frame
;
2003 FOR_EACH_FRAME (tail
, lisp_frame
)
2004 adjust_frame_glyphs (XFRAME (lisp_frame
));
2011 /* Adjust frame glyphs when Emacs is initialized.
2013 To be called from init_display.
2015 We need a glyph matrix because redraw will happen soon.
2016 Unfortunately, window sizes on selected_frame are not yet set to
2017 meaningful values. I believe we can assume that there are only two
2018 windows on the frame---the mini-buffer and the root window. Frame
2019 height and width seem to be correct so far. So, set the sizes of
2020 windows to estimated values. */
2023 adjust_frame_glyphs_initially (void)
2025 struct frame
*sf
= SELECTED_FRAME ();
2026 struct window
*root
= XWINDOW (sf
->root_window
);
2027 struct window
*mini
= XWINDOW (root
->next
);
2028 int frame_lines
= FRAME_LINES (sf
);
2029 int frame_cols
= FRAME_COLS (sf
);
2030 int top_margin
= FRAME_TOP_MARGIN (sf
);
2032 /* Do it for the root window. */
2033 XSETFASTINT (root
->top_line
, top_margin
);
2034 XSETFASTINT (root
->total_cols
, frame_cols
);
2035 set_window_height (sf
->root_window
, frame_lines
- 1 - top_margin
, 0);
2037 /* Do it for the mini-buffer window. */
2038 XSETFASTINT (mini
->top_line
, frame_lines
- 1);
2039 XSETFASTINT (mini
->total_cols
, frame_cols
);
2040 set_window_height (root
->next
, 1, 0);
2042 adjust_frame_glyphs (sf
);
2043 glyphs_initialized_initially_p
= 1;
2047 /* Allocate/reallocate glyph matrices of a single frame F. */
2050 adjust_frame_glyphs (struct frame
*f
)
2052 if (FRAME_WINDOW_P (f
))
2053 adjust_frame_glyphs_for_window_redisplay (f
);
2055 adjust_frame_glyphs_for_frame_redisplay (f
);
2057 /* Don't forget the message buffer and the buffer for
2058 decode_mode_spec. */
2059 adjust_frame_message_buffer (f
);
2060 adjust_decode_mode_spec_buffer (f
);
2062 f
->glyphs_initialized_p
= 1;
2065 /* Return 1 if any window in the tree has nonzero window margins. See
2066 the hack at the end of adjust_frame_glyphs_for_frame_redisplay. */
2068 showing_window_margins_p (struct window
*w
)
2072 if (!NILP (w
->hchild
))
2074 if (showing_window_margins_p (XWINDOW (w
->hchild
)))
2077 else if (!NILP (w
->vchild
))
2079 if (showing_window_margins_p (XWINDOW (w
->vchild
)))
2082 else if (!NILP (w
->left_margin_cols
)
2083 || !NILP (w
->right_margin_cols
))
2086 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2092 /* In the window tree with root W, build current matrices of leaf
2093 windows from the frame's current matrix. */
2096 fake_current_matrices (Lisp_Object window
)
2100 for (; !NILP (window
); window
= w
->next
)
2102 w
= XWINDOW (window
);
2104 if (!NILP (w
->hchild
))
2105 fake_current_matrices (w
->hchild
);
2106 else if (!NILP (w
->vchild
))
2107 fake_current_matrices (w
->vchild
);
2111 struct frame
*f
= XFRAME (w
->frame
);
2112 struct glyph_matrix
*m
= w
->current_matrix
;
2113 struct glyph_matrix
*fm
= f
->current_matrix
;
2115 xassert (m
->matrix_h
== WINDOW_TOTAL_LINES (w
));
2116 xassert (m
->matrix_w
== WINDOW_TOTAL_COLS (w
));
2118 for (i
= 0; i
< m
->matrix_h
; ++i
)
2120 struct glyph_row
*r
= m
->rows
+ i
;
2121 struct glyph_row
*fr
= fm
->rows
+ i
+ WINDOW_TOP_EDGE_LINE (w
);
2123 xassert (r
->glyphs
[TEXT_AREA
] >= fr
->glyphs
[TEXT_AREA
]
2124 && r
->glyphs
[LAST_AREA
] <= fr
->glyphs
[LAST_AREA
]);
2126 r
->enabled_p
= fr
->enabled_p
;
2129 r
->used
[LEFT_MARGIN_AREA
] = m
->left_margin_glyphs
;
2130 r
->used
[RIGHT_MARGIN_AREA
] = m
->right_margin_glyphs
;
2131 r
->used
[TEXT_AREA
] = (m
->matrix_w
2132 - r
->used
[LEFT_MARGIN_AREA
]
2133 - r
->used
[RIGHT_MARGIN_AREA
]);
2142 /* Save away the contents of frame F's current frame matrix. Value is
2143 a glyph matrix holding the contents of F's current frame matrix. */
2145 static struct glyph_matrix
*
2146 save_current_matrix (struct frame
*f
)
2149 struct glyph_matrix
*saved
;
2151 saved
= (struct glyph_matrix
*) xmalloc (sizeof *saved
);
2152 memset (saved
, 0, sizeof *saved
);
2153 saved
->nrows
= f
->current_matrix
->nrows
;
2154 saved
->rows
= (struct glyph_row
*) xmalloc (saved
->nrows
2155 * sizeof *saved
->rows
);
2156 memset (saved
->rows
, 0, saved
->nrows
* sizeof *saved
->rows
);
2158 for (i
= 0; i
< saved
->nrows
; ++i
)
2160 struct glyph_row
*from
= f
->current_matrix
->rows
+ i
;
2161 struct glyph_row
*to
= saved
->rows
+ i
;
2162 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2163 to
->glyphs
[TEXT_AREA
] = (struct glyph
*) xmalloc (nbytes
);
2164 memcpy (to
->glyphs
[TEXT_AREA
], from
->glyphs
[TEXT_AREA
], nbytes
);
2165 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2172 /* Restore the contents of frame F's current frame matrix from SAVED,
2173 and free memory associated with SAVED. */
2176 restore_current_matrix (struct frame
*f
, struct glyph_matrix
*saved
)
2180 for (i
= 0; i
< saved
->nrows
; ++i
)
2182 struct glyph_row
*from
= saved
->rows
+ i
;
2183 struct glyph_row
*to
= f
->current_matrix
->rows
+ i
;
2184 size_t nbytes
= from
->used
[TEXT_AREA
] * sizeof (struct glyph
);
2185 memcpy (to
->glyphs
[TEXT_AREA
], from
->glyphs
[TEXT_AREA
], nbytes
);
2186 to
->used
[TEXT_AREA
] = from
->used
[TEXT_AREA
];
2187 xfree (from
->glyphs
[TEXT_AREA
]);
2190 xfree (saved
->rows
);
2196 /* Allocate/reallocate glyph matrices of a single frame F for
2197 frame-based redisplay. */
2200 adjust_frame_glyphs_for_frame_redisplay (struct frame
*f
)
2202 struct dim matrix_dim
;
2204 int window_change_flags
;
2207 if (!FRAME_LIVE_P (f
))
2210 top_window_y
= FRAME_TOP_MARGIN (f
);
2212 /* Allocate glyph pool structures if not already done. */
2213 if (f
->desired_pool
== NULL
)
2215 f
->desired_pool
= new_glyph_pool ();
2216 f
->current_pool
= new_glyph_pool ();
2219 /* Allocate frames matrix structures if needed. */
2220 if (f
->desired_matrix
== NULL
)
2222 f
->desired_matrix
= new_glyph_matrix (f
->desired_pool
);
2223 f
->current_matrix
= new_glyph_matrix (f
->current_pool
);
2226 /* Compute window glyph matrices. (This takes the mini-buffer
2227 window into account). The result is the size of the frame glyph
2228 matrix needed. The variable window_change_flags is set to a bit
2229 mask indicating whether new matrices will be allocated or
2230 existing matrices change their size or location within the frame
2232 window_change_flags
= 0;
2234 = allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2237 &window_change_flags
);
2239 /* Add in menu bar lines, if any. */
2240 matrix_dim
.height
+= top_window_y
;
2242 /* Enlarge pools as necessary. */
2243 pool_changed_p
= realloc_glyph_pool (f
->desired_pool
, matrix_dim
);
2244 realloc_glyph_pool (f
->current_pool
, matrix_dim
);
2246 /* Set up glyph pointers within window matrices. Do this only if
2247 absolutely necessary since it requires a frame redraw. */
2248 if (pool_changed_p
|| window_change_flags
)
2250 /* Do it for window matrices. */
2251 allocate_matrices_for_frame_redisplay (FRAME_ROOT_WINDOW (f
),
2253 &window_change_flags
);
2255 /* Size of frame matrices must equal size of frame. Note
2256 that we are called for X frames with window widths NOT equal
2257 to the frame width (from CHANGE_FRAME_SIZE_1). */
2258 xassert (matrix_dim
.width
== FRAME_COLS (f
)
2259 && matrix_dim
.height
== FRAME_LINES (f
));
2261 /* Pointers to glyph memory in glyph rows are exchanged during
2262 the update phase of redisplay, which means in general that a
2263 frame's current matrix consists of pointers into both the
2264 desired and current glyph pool of the frame. Adjusting a
2265 matrix sets the frame matrix up so that pointers are all into
2266 the same pool. If we want to preserve glyph contents of the
2267 current matrix over a call to adjust_glyph_matrix, we must
2268 make a copy of the current glyphs, and restore the current
2269 matrix' contents from that copy. */
2270 if (display_completed
2271 && !FRAME_GARBAGED_P (f
)
2272 && matrix_dim
.width
== f
->current_matrix
->matrix_w
2273 && matrix_dim
.height
== f
->current_matrix
->matrix_h
2274 /* For some reason, the frame glyph matrix gets corrupted if
2275 any of the windows contain margins. I haven't been able
2276 to hunt down the reason, but for the moment this prevents
2277 the problem from manifesting. -- cyd */
2278 && !showing_window_margins_p (XWINDOW (FRAME_ROOT_WINDOW (f
))))
2280 struct glyph_matrix
*copy
= save_current_matrix (f
);
2281 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2282 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2283 restore_current_matrix (f
, copy
);
2284 fake_current_matrices (FRAME_ROOT_WINDOW (f
));
2288 adjust_glyph_matrix (NULL
, f
->desired_matrix
, 0, 0, matrix_dim
);
2289 adjust_glyph_matrix (NULL
, f
->current_matrix
, 0, 0, matrix_dim
);
2290 SET_FRAME_GARBAGED (f
);
2296 /* Allocate/reallocate glyph matrices of a single frame F for
2297 window-based redisplay. */
2300 adjust_frame_glyphs_for_window_redisplay (struct frame
*f
)
2304 xassert (FRAME_WINDOW_P (f
) && FRAME_LIVE_P (f
));
2306 /* Allocate/reallocate window matrices. */
2307 allocate_matrices_for_window_redisplay (XWINDOW (FRAME_ROOT_WINDOW (f
)));
2309 #ifdef HAVE_X_WINDOWS
2310 /* Allocate/ reallocate matrices of the dummy window used to display
2311 the menu bar under X when no X toolkit support is available. */
2312 #if ! defined (USE_X_TOOLKIT) && ! defined (USE_GTK)
2314 /* Allocate a dummy window if not already done. */
2315 if (NILP (f
->menu_bar_window
))
2317 f
->menu_bar_window
= make_window ();
2318 w
= XWINDOW (f
->menu_bar_window
);
2319 XSETFRAME (w
->frame
, f
);
2320 w
->pseudo_window_p
= 1;
2323 w
= XWINDOW (f
->menu_bar_window
);
2325 /* Set window dimensions to frame dimensions and allocate or
2326 adjust glyph matrices of W. */
2327 XSETFASTINT (w
->top_line
, 0);
2328 XSETFASTINT (w
->left_col
, 0);
2329 XSETFASTINT (w
->total_lines
, FRAME_MENU_BAR_LINES (f
));
2330 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2331 allocate_matrices_for_window_redisplay (w
);
2333 #endif /* not USE_X_TOOLKIT && not USE_GTK */
2334 #endif /* HAVE_X_WINDOWS */
2337 /* Allocate/ reallocate matrices of the tool bar window. If we
2338 don't have a tool bar window yet, make one. */
2339 if (NILP (f
->tool_bar_window
))
2341 f
->tool_bar_window
= make_window ();
2342 w
= XWINDOW (f
->tool_bar_window
);
2343 XSETFRAME (w
->frame
, f
);
2344 w
->pseudo_window_p
= 1;
2347 w
= XWINDOW (f
->tool_bar_window
);
2349 XSETFASTINT (w
->top_line
, FRAME_MENU_BAR_LINES (f
));
2350 XSETFASTINT (w
->left_col
, 0);
2351 XSETFASTINT (w
->total_lines
, FRAME_TOOL_BAR_LINES (f
));
2352 XSETFASTINT (w
->total_cols
, FRAME_TOTAL_COLS (f
));
2353 allocate_matrices_for_window_redisplay (w
);
2358 /* Adjust/ allocate message buffer of frame F.
2360 Note that the message buffer is never freed. Since I could not
2361 find a free in 19.34, I assume that freeing it would be
2362 problematic in some way and don't do it either.
2364 (Implementation note: It should be checked if we can free it
2365 eventually without causing trouble). */
2368 adjust_frame_message_buffer (struct frame
*f
)
2370 int size
= FRAME_MESSAGE_BUF_SIZE (f
) + 1;
2372 if (FRAME_MESSAGE_BUF (f
))
2374 char *buffer
= FRAME_MESSAGE_BUF (f
);
2375 char *new_buffer
= (char *) xrealloc (buffer
, size
);
2376 FRAME_MESSAGE_BUF (f
) = new_buffer
;
2379 FRAME_MESSAGE_BUF (f
) = (char *) xmalloc (size
);
2383 /* Re-allocate buffer for decode_mode_spec on frame F. */
2386 adjust_decode_mode_spec_buffer (struct frame
*f
)
2388 f
->decode_mode_spec_buffer
2389 = (char *) xrealloc (f
->decode_mode_spec_buffer
,
2390 FRAME_MESSAGE_BUF_SIZE (f
) + 1);
2395 /**********************************************************************
2396 Freeing Glyph Matrices
2397 **********************************************************************/
2399 /* Free glyph memory for a frame F. F may be null. This function can
2400 be called for the same frame more than once. The root window of
2401 F may be nil when this function is called. This is the case when
2402 the function is called when F is destroyed. */
2405 free_glyphs (struct frame
*f
)
2407 if (f
&& f
->glyphs_initialized_p
)
2409 /* Block interrupt input so that we don't get surprised by an X
2410 event while we're in an inconsistent state. */
2412 f
->glyphs_initialized_p
= 0;
2414 /* Release window sub-matrices. */
2415 if (!NILP (f
->root_window
))
2416 free_window_matrices (XWINDOW (f
->root_window
));
2418 /* Free the dummy window for menu bars without X toolkit and its
2420 if (!NILP (f
->menu_bar_window
))
2422 struct window
*w
= XWINDOW (f
->menu_bar_window
);
2423 free_glyph_matrix (w
->desired_matrix
);
2424 free_glyph_matrix (w
->current_matrix
);
2425 w
->desired_matrix
= w
->current_matrix
= NULL
;
2426 f
->menu_bar_window
= Qnil
;
2429 /* Free the tool bar window and its glyph matrices. */
2430 if (!NILP (f
->tool_bar_window
))
2432 struct window
*w
= XWINDOW (f
->tool_bar_window
);
2433 free_glyph_matrix (w
->desired_matrix
);
2434 free_glyph_matrix (w
->current_matrix
);
2435 w
->desired_matrix
= w
->current_matrix
= NULL
;
2436 f
->tool_bar_window
= Qnil
;
2439 /* Release frame glyph matrices. Reset fields to zero in
2440 case we are called a second time. */
2441 if (f
->desired_matrix
)
2443 free_glyph_matrix (f
->desired_matrix
);
2444 free_glyph_matrix (f
->current_matrix
);
2445 f
->desired_matrix
= f
->current_matrix
= NULL
;
2448 /* Release glyph pools. */
2449 if (f
->desired_pool
)
2451 free_glyph_pool (f
->desired_pool
);
2452 free_glyph_pool (f
->current_pool
);
2453 f
->desired_pool
= f
->current_pool
= NULL
;
2461 /* Free glyph sub-matrices in the window tree rooted at W. This
2462 function may be called with a null pointer, and it may be called on
2463 the same tree more than once. */
2466 free_window_matrices (struct window
*w
)
2470 if (!NILP (w
->hchild
))
2471 free_window_matrices (XWINDOW (w
->hchild
));
2472 else if (!NILP (w
->vchild
))
2473 free_window_matrices (XWINDOW (w
->vchild
));
2476 /* This is a leaf window. Free its memory and reset fields
2477 to zero in case this function is called a second time for
2479 free_glyph_matrix (w
->current_matrix
);
2480 free_glyph_matrix (w
->desired_matrix
);
2481 w
->current_matrix
= w
->desired_matrix
= NULL
;
2484 /* Next window on same level. */
2485 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2490 /* Check glyph memory leaks. This function is called from
2491 shut_down_emacs. Note that frames are not destroyed when Emacs
2492 exits. We therefore free all glyph memory for all active frames
2493 explicitly and check that nothing is left allocated. */
2496 check_glyph_memory (void)
2498 Lisp_Object tail
, frame
;
2500 /* Free glyph memory for all frames. */
2501 FOR_EACH_FRAME (tail
, frame
)
2502 free_glyphs (XFRAME (frame
));
2504 /* Check that nothing is left allocated. */
2505 if (glyph_matrix_count
)
2507 if (glyph_pool_count
)
2513 /**********************************************************************
2514 Building a Frame Matrix
2515 **********************************************************************/
2517 /* Most of the redisplay code works on glyph matrices attached to
2518 windows. This is a good solution most of the time, but it is not
2519 suitable for terminal code. Terminal output functions cannot rely
2520 on being able to set an arbitrary terminal window. Instead they
2521 must be provided with a view of the whole frame, i.e. the whole
2522 screen. We build such a view by constructing a frame matrix from
2523 window matrices in this section.
2525 Windows that must be updated have their must_be_update_p flag set.
2526 For all such windows, their desired matrix is made part of the
2527 desired frame matrix. For other windows, their current matrix is
2528 made part of the desired frame matrix.
2530 +-----------------+----------------+
2531 | desired | desired |
2533 +-----------------+----------------+
2536 +----------------------------------+
2538 Desired window matrices can be made part of the frame matrix in a
2539 cheap way: We exploit the fact that the desired frame matrix and
2540 desired window matrices share their glyph memory. This is not
2541 possible for current window matrices. Their glyphs are copied to
2542 the desired frame matrix. The latter is equivalent to
2543 preserve_other_columns in the old redisplay.
2545 Used glyphs counters for frame matrix rows are the result of adding
2546 up glyph lengths of the window matrices. A line in the frame
2547 matrix is enabled, if a corresponding line in a window matrix is
2550 After building the desired frame matrix, it will be passed to
2551 terminal code, which will manipulate both the desired and current
2552 frame matrix. Changes applied to the frame's current matrix have
2553 to be visible in current window matrices afterwards, of course.
2555 This problem is solved like this:
2557 1. Window and frame matrices share glyphs. Window matrices are
2558 constructed in a way that their glyph contents ARE the glyph
2559 contents needed in a frame matrix. Thus, any modification of
2560 glyphs done in terminal code will be reflected in window matrices
2563 2. Exchanges of rows in a frame matrix done by terminal code are
2564 intercepted by hook functions so that corresponding row operations
2565 on window matrices can be performed. This is necessary because we
2566 use pointers to glyphs in glyph row structures. To satisfy the
2567 assumption of point 1 above that glyphs are updated implicitly in
2568 window matrices when they are manipulated via the frame matrix,
2569 window and frame matrix must of course agree where to find the
2570 glyphs for their rows. Possible manipulations that must be
2571 mirrored are assignments of rows of the desired frame matrix to the
2572 current frame matrix and scrolling the current frame matrix. */
2574 /* Build frame F's desired matrix from window matrices. Only windows
2575 which have the flag must_be_updated_p set have to be updated. Menu
2576 bar lines of a frame are not covered by window matrices, so make
2577 sure not to touch them in this function. */
2580 build_frame_matrix (struct frame
*f
)
2584 /* F must have a frame matrix when this function is called. */
2585 xassert (!FRAME_WINDOW_P (f
));
2587 /* Clear all rows in the frame matrix covered by window matrices.
2588 Menu bar lines are not covered by windows. */
2589 for (i
= FRAME_TOP_MARGIN (f
); i
< f
->desired_matrix
->nrows
; ++i
)
2590 clear_glyph_row (MATRIX_ROW (f
->desired_matrix
, i
));
2592 /* Build the matrix by walking the window tree. */
2593 build_frame_matrix_from_window_tree (f
->desired_matrix
,
2594 XWINDOW (FRAME_ROOT_WINDOW (f
)));
2598 /* Walk a window tree, building a frame matrix MATRIX from window
2599 matrices. W is the root of a window tree. */
2602 build_frame_matrix_from_window_tree (struct glyph_matrix
*matrix
, struct window
*w
)
2606 if (!NILP (w
->hchild
))
2607 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->hchild
));
2608 else if (!NILP (w
->vchild
))
2609 build_frame_matrix_from_window_tree (matrix
, XWINDOW (w
->vchild
));
2611 build_frame_matrix_from_leaf_window (matrix
, w
);
2613 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2618 /* Add a window's matrix to a frame matrix. FRAME_MATRIX is the
2619 desired frame matrix built. W is a leaf window whose desired or
2620 current matrix is to be added to FRAME_MATRIX. W's flag
2621 must_be_updated_p determines which matrix it contributes to
2622 FRAME_MATRIX. If must_be_updated_p is non-zero, W's desired matrix
2623 is added to FRAME_MATRIX, otherwise W's current matrix is added.
2624 Adding a desired matrix means setting up used counters and such in
2625 frame rows, while adding a current window matrix to FRAME_MATRIX
2626 means copying glyphs. The latter case corresponds to
2627 preserve_other_columns in the old redisplay. */
2630 build_frame_matrix_from_leaf_window (struct glyph_matrix
*frame_matrix
, struct window
*w
)
2632 struct glyph_matrix
*window_matrix
;
2633 int window_y
, frame_y
;
2634 /* If non-zero, a glyph to insert at the right border of W. */
2635 GLYPH right_border_glyph
;
2637 SET_GLYPH_FROM_CHAR (right_border_glyph
, 0);
2639 /* Set window_matrix to the matrix we have to add to FRAME_MATRIX. */
2640 if (w
->must_be_updated_p
)
2642 window_matrix
= w
->desired_matrix
;
2644 /* Decide whether we want to add a vertical border glyph. */
2645 if (!WINDOW_RIGHTMOST_P (w
))
2647 struct Lisp_Char_Table
*dp
= window_display_table (w
);
2650 SET_GLYPH_FROM_CHAR (right_border_glyph
, '|');
2652 && (gc
= DISP_BORDER_GLYPH (dp
), GLYPH_CODE_P (gc
))
2653 && GLYPH_CODE_CHAR_VALID_P (gc
))
2655 SET_GLYPH_FROM_GLYPH_CODE (right_border_glyph
, gc
);
2656 spec_glyph_lookup_face (w
, &right_border_glyph
);
2659 if (GLYPH_FACE (right_border_glyph
) <= 0)
2660 SET_GLYPH_FACE (right_border_glyph
, VERTICAL_BORDER_FACE_ID
);
2664 window_matrix
= w
->current_matrix
;
2666 /* For all rows in the window matrix and corresponding rows in the
2669 frame_y
= window_matrix
->matrix_y
;
2670 while (window_y
< window_matrix
->nrows
)
2672 struct glyph_row
*frame_row
= frame_matrix
->rows
+ frame_y
;
2673 struct glyph_row
*window_row
= window_matrix
->rows
+ window_y
;
2674 int current_row_p
= window_matrix
== w
->current_matrix
;
2676 /* Fill up the frame row with spaces up to the left margin of the
2678 fill_up_frame_row_with_spaces (frame_row
, window_matrix
->matrix_x
);
2680 /* Fill up areas in the window matrix row with spaces. */
2681 fill_up_glyph_row_with_spaces (window_row
);
2683 /* If only part of W's desired matrix has been built, and
2684 window_row wasn't displayed, use the corresponding current
2686 if (window_matrix
== w
->desired_matrix
2687 && !window_row
->enabled_p
)
2689 window_row
= w
->current_matrix
->rows
+ window_y
;
2695 /* Copy window row to frame row. */
2696 memcpy (frame_row
->glyphs
[TEXT_AREA
] + window_matrix
->matrix_x
,
2697 window_row
->glyphs
[0],
2698 window_matrix
->matrix_w
* sizeof (struct glyph
));
2702 xassert (window_row
->enabled_p
);
2704 /* Only when a desired row has been displayed, we want
2705 the corresponding frame row to be updated. */
2706 frame_row
->enabled_p
= 1;
2708 /* Maybe insert a vertical border between horizontally adjacent
2710 if (GLYPH_CHAR (right_border_glyph
) != 0)
2712 struct glyph
*border
= window_row
->glyphs
[LAST_AREA
] - 1;
2713 SET_CHAR_GLYPH_FROM_GLYPH (*border
, right_border_glyph
);
2717 /* Window row window_y must be a slice of frame row
2719 xassert (glyph_row_slice_p (window_row
, frame_row
));
2721 /* If rows are in sync, we don't have to copy glyphs because
2722 frame and window share glyphs. */
2724 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
2725 add_window_display_history (w
, w
->current_matrix
->method
, 0);
2729 /* Set number of used glyphs in the frame matrix. Since we fill
2730 up with spaces, and visit leaf windows from left to right it
2731 can be done simply. */
2732 frame_row
->used
[TEXT_AREA
]
2733 = window_matrix
->matrix_x
+ window_matrix
->matrix_w
;
2741 /* Given a user-specified glyph, possibly including a Lisp-level face
2742 ID, return a glyph that has a realized face ID.
2743 This is used for glyphs displayed specially and not part of the text;
2744 for instance, vertical separators, truncation markers, etc. */
2747 spec_glyph_lookup_face (struct window
*w
, GLYPH
*glyph
)
2749 int lface_id
= GLYPH_FACE (*glyph
);
2750 /* Convert the glyph's specified face to a realized (cache) face. */
2753 int face_id
= merge_faces (XFRAME (w
->frame
),
2754 Qt
, lface_id
, DEFAULT_FACE_ID
);
2755 SET_GLYPH_FACE (*glyph
, face_id
);
2759 /* Add spaces to a glyph row ROW in a window matrix.
2761 Each row has the form:
2763 +---------+-----------------------------+------------+
2764 | left | text | right |
2765 +---------+-----------------------------+------------+
2767 Left and right marginal areas are optional. This function adds
2768 spaces to areas so that there are no empty holes between areas.
2769 In other words: If the right area is not empty, the text area
2770 is filled up with spaces up to the right area. If the text area
2771 is not empty, the left area is filled up.
2773 To be called for frame-based redisplay, only. */
2776 fill_up_glyph_row_with_spaces (struct glyph_row
*row
)
2778 fill_up_glyph_row_area_with_spaces (row
, LEFT_MARGIN_AREA
);
2779 fill_up_glyph_row_area_with_spaces (row
, TEXT_AREA
);
2780 fill_up_glyph_row_area_with_spaces (row
, RIGHT_MARGIN_AREA
);
2784 /* Fill area AREA of glyph row ROW with spaces. To be called for
2785 frame-based redisplay only. */
2788 fill_up_glyph_row_area_with_spaces (struct glyph_row
*row
, int area
)
2790 if (row
->glyphs
[area
] < row
->glyphs
[area
+ 1])
2792 struct glyph
*end
= row
->glyphs
[area
+ 1];
2793 struct glyph
*text
= row
->glyphs
[area
] + row
->used
[area
];
2796 *text
++ = space_glyph
;
2797 row
->used
[area
] = text
- row
->glyphs
[area
];
2802 /* Add spaces to the end of ROW in a frame matrix until index UPTO is
2803 reached. In frame matrices only one area, TEXT_AREA, is used. */
2806 fill_up_frame_row_with_spaces (struct glyph_row
*row
, int upto
)
2808 int i
= row
->used
[TEXT_AREA
];
2809 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
];
2812 glyph
[i
++] = space_glyph
;
2814 row
->used
[TEXT_AREA
] = i
;
2819 /**********************************************************************
2820 Mirroring operations on frame matrices in window matrices
2821 **********************************************************************/
2823 /* Set frame being updated via frame-based redisplay to F. This
2824 function must be called before updates to make explicit that we are
2825 working on frame matrices or not. */
2828 set_frame_matrix_frame (struct frame
*f
)
2830 frame_matrix_frame
= f
;
2834 /* Make sure glyph row ROW in CURRENT_MATRIX is up to date.
2835 DESIRED_MATRIX is the desired matrix corresponding to
2836 CURRENT_MATRIX. The update is done by exchanging glyph pointers
2837 between rows in CURRENT_MATRIX and DESIRED_MATRIX. If
2838 frame_matrix_frame is non-null, this indicates that the exchange is
2839 done in frame matrices, and that we have to perform analogous
2840 operations in window matrices of frame_matrix_frame. */
2843 make_current (struct glyph_matrix
*desired_matrix
, struct glyph_matrix
*current_matrix
, int row
)
2845 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, row
);
2846 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, row
);
2847 int mouse_face_p
= current_row
->mouse_face_p
;
2849 /* Do current_row = desired_row. This exchanges glyph pointers
2850 between both rows, and does a structure assignment otherwise. */
2851 assign_row (current_row
, desired_row
);
2853 /* Enable current_row to mark it as valid. */
2854 current_row
->enabled_p
= 1;
2855 current_row
->mouse_face_p
= mouse_face_p
;
2857 /* If we are called on frame matrices, perform analogous operations
2858 for window matrices. */
2859 if (frame_matrix_frame
)
2860 mirror_make_current (XWINDOW (frame_matrix_frame
->root_window
), row
);
2864 /* W is the root of a window tree. FRAME_ROW is the index of a row in
2865 W's frame which has been made current (by swapping pointers between
2866 current and desired matrix). Perform analogous operations in the
2867 matrices of leaf windows in the window tree rooted at W. */
2870 mirror_make_current (struct window
*w
, int frame_row
)
2874 if (!NILP (w
->hchild
))
2875 mirror_make_current (XWINDOW (w
->hchild
), frame_row
);
2876 else if (!NILP (w
->vchild
))
2877 mirror_make_current (XWINDOW (w
->vchild
), frame_row
);
2880 /* Row relative to window W. Don't use FRAME_TO_WINDOW_VPOS
2881 here because the checks performed in debug mode there
2882 will not allow the conversion. */
2883 int row
= frame_row
- w
->desired_matrix
->matrix_y
;
2885 /* If FRAME_ROW is within W, assign the desired row to the
2886 current row (exchanging glyph pointers). */
2887 if (row
>= 0 && row
< w
->desired_matrix
->matrix_h
)
2889 struct glyph_row
*current_row
2890 = MATRIX_ROW (w
->current_matrix
, row
);
2891 struct glyph_row
*desired_row
2892 = MATRIX_ROW (w
->desired_matrix
, row
);
2894 if (desired_row
->enabled_p
)
2895 assign_row (current_row
, desired_row
);
2897 swap_glyph_pointers (desired_row
, current_row
);
2898 current_row
->enabled_p
= 1;
2902 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
2907 /* Perform row dance after scrolling. We are working on the range of
2908 lines UNCHANGED_AT_TOP + 1 to UNCHANGED_AT_TOP + NLINES (not
2909 including) in MATRIX. COPY_FROM is a vector containing, for each
2910 row I in the range 0 <= I < NLINES, the index of the original line
2911 to move to I. This index is relative to the row range, i.e. 0 <=
2912 index < NLINES. RETAINED_P is a vector containing zero for each
2913 row 0 <= I < NLINES which is empty.
2915 This function is called from do_scrolling and do_direct_scrolling. */
2918 mirrored_line_dance (matrix
, unchanged_at_top
, nlines
, copy_from
,
2920 struct glyph_matrix
*matrix
;
2921 int unchanged_at_top
, nlines
;
2925 /* A copy of original rows. */
2926 struct glyph_row
*old_rows
;
2928 /* Rows to assign to. */
2929 struct glyph_row
*new_rows
= MATRIX_ROW (matrix
, unchanged_at_top
);
2933 /* Make a copy of the original rows. */
2934 old_rows
= (struct glyph_row
*) alloca (nlines
* sizeof *old_rows
);
2935 memcpy (old_rows
, new_rows
, nlines
* sizeof *old_rows
);
2937 /* Assign new rows, maybe clear lines. */
2938 for (i
= 0; i
< nlines
; ++i
)
2940 int enabled_before_p
= new_rows
[i
].enabled_p
;
2942 xassert (i
+ unchanged_at_top
< matrix
->nrows
);
2943 xassert (unchanged_at_top
+ copy_from
[i
] < matrix
->nrows
);
2944 new_rows
[i
] = old_rows
[copy_from
[i
]];
2945 new_rows
[i
].enabled_p
= enabled_before_p
;
2947 /* RETAINED_P is zero for empty lines. */
2948 if (!retained_p
[copy_from
[i
]])
2949 new_rows
[i
].enabled_p
= 0;
2952 /* Do the same for window matrices, if MATRIX is a frame matrix. */
2953 if (frame_matrix_frame
)
2954 mirror_line_dance (XWINDOW (frame_matrix_frame
->root_window
),
2955 unchanged_at_top
, nlines
, copy_from
, retained_p
);
2959 /* Synchronize glyph pointers in the current matrix of window W with
2960 the current frame matrix. */
2963 sync_window_with_frame_matrix_rows (struct window
*w
)
2965 struct frame
*f
= XFRAME (w
->frame
);
2966 struct glyph_row
*window_row
, *window_row_end
, *frame_row
;
2967 int left
, right
, x
, width
;
2969 /* Preconditions: W must be a leaf window on a tty frame. */
2970 xassert (NILP (w
->hchild
) && NILP (w
->vchild
));
2971 xassert (!FRAME_WINDOW_P (f
));
2973 left
= margin_glyphs_to_reserve (w
, 1, w
->left_margin_cols
);
2974 right
= margin_glyphs_to_reserve (w
, 1, w
->right_margin_cols
);
2975 x
= w
->current_matrix
->matrix_x
;
2976 width
= w
->current_matrix
->matrix_w
;
2978 window_row
= w
->current_matrix
->rows
;
2979 window_row_end
= window_row
+ w
->current_matrix
->nrows
;
2980 frame_row
= f
->current_matrix
->rows
+ WINDOW_TOP_EDGE_LINE (w
);
2982 for (; window_row
< window_row_end
; ++window_row
, ++frame_row
)
2984 window_row
->glyphs
[LEFT_MARGIN_AREA
]
2985 = frame_row
->glyphs
[0] + x
;
2986 window_row
->glyphs
[TEXT_AREA
]
2987 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + left
;
2988 window_row
->glyphs
[LAST_AREA
]
2989 = window_row
->glyphs
[LEFT_MARGIN_AREA
] + width
;
2990 window_row
->glyphs
[RIGHT_MARGIN_AREA
]
2991 = window_row
->glyphs
[LAST_AREA
] - right
;
2996 /* Return the window in the window tree rooted in W containing frame
2997 row ROW. Value is null if none is found. */
3000 frame_row_to_window (struct window
*w
, int row
)
3002 struct window
*found
= NULL
;
3006 if (!NILP (w
->hchild
))
3007 found
= frame_row_to_window (XWINDOW (w
->hchild
), row
);
3008 else if (!NILP (w
->vchild
))
3009 found
= frame_row_to_window (XWINDOW (w
->vchild
), row
);
3010 else if (row
>= WINDOW_TOP_EDGE_LINE (w
)
3011 && row
< WINDOW_BOTTOM_EDGE_LINE (w
))
3014 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3021 /* Perform a line dance in the window tree rooted at W, after
3022 scrolling a frame matrix in mirrored_line_dance.
3024 We are working on the range of lines UNCHANGED_AT_TOP + 1 to
3025 UNCHANGED_AT_TOP + NLINES (not including) in W's frame matrix.
3026 COPY_FROM is a vector containing, for each row I in the range 0 <=
3027 I < NLINES, the index of the original line to move to I. This
3028 index is relative to the row range, i.e. 0 <= index < NLINES.
3029 RETAINED_P is a vector containing zero for each row 0 <= I < NLINES
3033 mirror_line_dance (struct window
*w
, int unchanged_at_top
, int nlines
, int *copy_from
, char *retained_p
)
3037 if (!NILP (w
->hchild
))
3038 mirror_line_dance (XWINDOW (w
->hchild
), unchanged_at_top
,
3039 nlines
, copy_from
, retained_p
);
3040 else if (!NILP (w
->vchild
))
3041 mirror_line_dance (XWINDOW (w
->vchild
), unchanged_at_top
,
3042 nlines
, copy_from
, retained_p
);
3045 /* W is a leaf window, and we are working on its current
3047 struct glyph_matrix
*m
= w
->current_matrix
;
3049 struct glyph_row
*old_rows
;
3051 /* Make a copy of the original rows of matrix m. */
3052 old_rows
= (struct glyph_row
*) alloca (m
->nrows
* sizeof *old_rows
);
3053 memcpy (old_rows
, m
->rows
, m
->nrows
* sizeof *old_rows
);
3055 for (i
= 0; i
< nlines
; ++i
)
3057 /* Frame relative line assigned to. */
3058 int frame_to
= i
+ unchanged_at_top
;
3060 /* Frame relative line assigned. */
3061 int frame_from
= copy_from
[i
] + unchanged_at_top
;
3063 /* Window relative line assigned to. */
3064 int window_to
= frame_to
- m
->matrix_y
;
3066 /* Window relative line assigned. */
3067 int window_from
= frame_from
- m
->matrix_y
;
3069 /* Is assigned line inside window? */
3070 int from_inside_window_p
3071 = window_from
>= 0 && window_from
< m
->matrix_h
;
3073 /* Is assigned to line inside window? */
3074 int to_inside_window_p
3075 = window_to
>= 0 && window_to
< m
->matrix_h
;
3077 if (from_inside_window_p
&& to_inside_window_p
)
3079 /* Enabled setting before assignment. */
3080 int enabled_before_p
;
3082 /* Do the assignment. The enabled_p flag is saved
3083 over the assignment because the old redisplay did
3085 enabled_before_p
= m
->rows
[window_to
].enabled_p
;
3086 m
->rows
[window_to
] = old_rows
[window_from
];
3087 m
->rows
[window_to
].enabled_p
= enabled_before_p
;
3089 /* If frame line is empty, window line is empty, too. */
3090 if (!retained_p
[copy_from
[i
]])
3091 m
->rows
[window_to
].enabled_p
= 0;
3093 else if (to_inside_window_p
)
3095 /* A copy between windows. This is an infrequent
3096 case not worth optimizing. */
3097 struct frame
*f
= XFRAME (w
->frame
);
3098 struct window
*root
= XWINDOW (FRAME_ROOT_WINDOW (f
));
3100 struct glyph_matrix
*m2
;
3103 w2
= frame_row_to_window (root
, frame_from
);
3104 /* ttn@surf.glug.org: when enabling menu bar using `emacs
3105 -nw', FROM_FRAME sometimes has no associated window.
3106 This check avoids a segfault if W2 is null. */
3109 m2
= w2
->current_matrix
;
3110 m2_from
= frame_from
- m2
->matrix_y
;
3111 copy_row_except_pointers (m
->rows
+ window_to
,
3112 m2
->rows
+ m2_from
);
3114 /* If frame line is empty, window line is empty, too. */
3115 if (!retained_p
[copy_from
[i
]])
3116 m
->rows
[window_to
].enabled_p
= 0;
3120 else if (from_inside_window_p
)
3124 /* If there was a copy between windows, make sure glyph
3125 pointers are in sync with the frame matrix. */
3127 sync_window_with_frame_matrix_rows (w
);
3129 /* Check that no pointers are lost. */
3133 /* Next window on same level. */
3134 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3141 /* Check that window and frame matrices agree about their
3142 understanding where glyphs of the rows are to find. For each
3143 window in the window tree rooted at W, check that rows in the
3144 matrices of leaf window agree with their frame matrices about
3148 check_window_matrix_pointers (w
)
3153 if (!NILP (w
->hchild
))
3154 check_window_matrix_pointers (XWINDOW (w
->hchild
));
3155 else if (!NILP (w
->vchild
))
3156 check_window_matrix_pointers (XWINDOW (w
->vchild
));
3159 struct frame
*f
= XFRAME (w
->frame
);
3160 check_matrix_pointers (w
->desired_matrix
, f
->desired_matrix
);
3161 check_matrix_pointers (w
->current_matrix
, f
->current_matrix
);
3164 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3169 /* Check that window rows are slices of frame rows. WINDOW_MATRIX is
3170 a window and FRAME_MATRIX is the corresponding frame matrix. For
3171 each row in WINDOW_MATRIX check that it's a slice of the
3172 corresponding frame row. If it isn't, abort. */
3175 check_matrix_pointers (window_matrix
, frame_matrix
)
3176 struct glyph_matrix
*window_matrix
, *frame_matrix
;
3178 /* Row number in WINDOW_MATRIX. */
3181 /* Row number corresponding to I in FRAME_MATRIX. */
3182 int j
= window_matrix
->matrix_y
;
3184 /* For all rows check that the row in the window matrix is a
3185 slice of the row in the frame matrix. If it isn't we didn't
3186 mirror an operation on the frame matrix correctly. */
3187 while (i
< window_matrix
->nrows
)
3189 if (!glyph_row_slice_p (window_matrix
->rows
+ i
,
3190 frame_matrix
->rows
+ j
))
3196 #endif /* GLYPH_DEBUG != 0 */
3200 /**********************************************************************
3201 VPOS and HPOS translations
3202 **********************************************************************/
3206 /* Translate vertical position VPOS which is relative to window W to a
3207 vertical position relative to W's frame. */
3210 window_to_frame_vpos (w
, vpos
)
3214 struct frame
*f
= XFRAME (w
->frame
);
3216 xassert (!FRAME_WINDOW_P (f
));
3217 xassert (vpos
>= 0 && vpos
<= w
->desired_matrix
->nrows
);
3218 vpos
+= WINDOW_TOP_EDGE_LINE (w
);
3219 xassert (vpos
>= 0 && vpos
<= FRAME_LINES (f
));
3224 /* Translate horizontal position HPOS which is relative to window W to
3225 a horizontal position relative to W's frame. */
3228 window_to_frame_hpos (w
, hpos
)
3232 xassert (!FRAME_WINDOW_P (XFRAME (w
->frame
)));
3233 hpos
+= WINDOW_LEFT_EDGE_COL (w
);
3237 #endif /* GLYPH_DEBUG */
3241 /**********************************************************************
3243 **********************************************************************/
3245 DEFUN ("redraw-frame", Fredraw_frame
, Sredraw_frame
, 1, 1, 0,
3246 doc
: /* Clear frame FRAME and output again what is supposed to appear on it. */)
3251 CHECK_LIVE_FRAME (frame
);
3254 /* Ignore redraw requests, if frame has no glyphs yet.
3255 (Implementation note: It still has to be checked why we are
3256 called so early here). */
3257 if (!glyphs_initialized_initially_p
)
3262 if (FRAME_MSDOS_P (f
))
3263 FRAME_TERMINAL (f
)->set_terminal_modes_hook (FRAME_TERMINAL (f
));
3266 clear_current_matrices (f
);
3268 if (FRAME_TERMCAP_P (f
))
3269 fflush (FRAME_TTY (f
)->output
);
3270 windows_or_buffers_changed
++;
3271 /* Mark all windows as inaccurate, so that every window will have
3272 its redisplay done. */
3273 mark_window_display_accurate (FRAME_ROOT_WINDOW (f
), 0);
3274 set_window_update_flags (XWINDOW (FRAME_ROOT_WINDOW (f
)), 1);
3280 /* Redraw frame F. This is nothing more than a call to the Lisp
3281 function redraw-frame. */
3284 redraw_frame (struct frame
*f
)
3287 XSETFRAME (frame
, f
);
3288 Fredraw_frame (frame
);
3292 DEFUN ("redraw-display", Fredraw_display
, Sredraw_display
, 0, 0, "",
3293 doc
: /* Clear and redisplay all visible frames. */)
3296 Lisp_Object tail
, frame
;
3298 FOR_EACH_FRAME (tail
, frame
)
3299 if (FRAME_VISIBLE_P (XFRAME (frame
)))
3300 Fredraw_frame (frame
);
3306 /* This is used when frame_garbaged is set. Call Fredraw_frame on all
3307 visible frames marked as garbaged. */
3310 redraw_garbaged_frames (void)
3312 Lisp_Object tail
, frame
;
3314 FOR_EACH_FRAME (tail
, frame
)
3315 if (FRAME_VISIBLE_P (XFRAME (frame
))
3316 && FRAME_GARBAGED_P (XFRAME (frame
)))
3317 Fredraw_frame (frame
);
3322 /***********************************************************************
3324 ***********************************************************************/
3326 /* Update frame F based on the data in desired matrices.
3328 If FORCE_P is non-zero, don't let redisplay be stopped by detecting
3329 pending input. If INHIBIT_HAIRY_ID_P is non-zero, don't try
3332 Value is non-zero if redisplay was stopped due to pending input. */
3335 update_frame (struct frame
*f
, int force_p
, int inhibit_hairy_id_p
)
3337 /* 1 means display has been paused because of pending input. */
3339 struct window
*root_window
= XWINDOW (f
->root_window
);
3341 if (redisplay_dont_pause
)
3343 #if PERIODIC_PREEMPTION_CHECKING
3344 else if (NILP (Vredisplay_preemption_period
))
3346 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3349 double p
= XFLOATINT (Vredisplay_preemption_period
);
3352 if (detect_input_pending_ignore_squeezables ())
3359 usec
= (p
- sec
) * 1000000;
3361 EMACS_GET_TIME (tm
);
3362 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3363 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3367 if (FRAME_WINDOW_P (f
))
3369 /* We are working on window matrix basis. All windows whose
3370 flag must_be_updated_p is set have to be updated. */
3372 /* Record that we are not working on frame matrices. */
3373 set_frame_matrix_frame (NULL
);
3375 /* Update all windows in the window tree of F, maybe stopping
3376 when pending input is detected. */
3379 /* Update the menu bar on X frames that don't have toolkit
3381 if (WINDOWP (f
->menu_bar_window
))
3382 update_window (XWINDOW (f
->menu_bar_window
), 1);
3384 /* Update the tool-bar window, if present. */
3385 if (WINDOWP (f
->tool_bar_window
))
3387 struct window
*w
= XWINDOW (f
->tool_bar_window
);
3389 /* Update tool-bar window. */
3390 if (w
->must_be_updated_p
)
3394 update_window (w
, 1);
3395 w
->must_be_updated_p
= 0;
3397 /* Swap tool-bar strings. We swap because we want to
3399 tem
= f
->current_tool_bar_string
;
3400 f
->current_tool_bar_string
= f
->desired_tool_bar_string
;
3401 f
->desired_tool_bar_string
= tem
;
3406 /* Update windows. */
3407 paused_p
= update_window_tree (root_window
, force_p
);
3410 /* This flush is a performance bottleneck under X,
3411 and it doesn't seem to be necessary anyway (in general).
3412 It is necessary when resizing the window with the mouse, or
3413 at least the fringes are not redrawn in a timely manner. ++kfs */
3414 if (f
->force_flush_display_p
)
3416 FRAME_RIF (f
)->flush_display (f
);
3417 f
->force_flush_display_p
= 0;
3422 /* We are working on frame matrix basis. Set the frame on whose
3423 frame matrix we operate. */
3424 set_frame_matrix_frame (f
);
3426 /* Build F's desired matrix from window matrices. */
3427 build_frame_matrix (f
);
3429 /* Update the display */
3431 paused_p
= update_frame_1 (f
, force_p
, inhibit_hairy_id_p
);
3434 if (FRAME_TERMCAP_P (f
) || FRAME_MSDOS_P (f
))
3436 if (FRAME_TTY (f
)->termscript
)
3437 fflush (FRAME_TTY (f
)->termscript
);
3438 if (FRAME_TERMCAP_P (f
))
3439 fflush (FRAME_TTY (f
)->output
);
3442 /* Check window matrices for lost pointers. */
3444 check_window_matrix_pointers (root_window
);
3445 add_frame_display_history (f
, paused_p
);
3450 /* Reset flags indicating that a window should be updated. */
3451 set_window_update_flags (root_window
, 0);
3453 display_completed
= !paused_p
;
3459 /************************************************************************
3460 Window-based updates
3461 ************************************************************************/
3463 /* Perform updates in window tree rooted at W. FORCE_P non-zero means
3464 don't stop updating when input is pending. */
3467 update_window_tree (struct window
*w
, int force_p
)
3471 while (w
&& !paused_p
)
3473 if (!NILP (w
->hchild
))
3474 paused_p
|= update_window_tree (XWINDOW (w
->hchild
), force_p
);
3475 else if (!NILP (w
->vchild
))
3476 paused_p
|= update_window_tree (XWINDOW (w
->vchild
), force_p
);
3477 else if (w
->must_be_updated_p
)
3478 paused_p
|= update_window (w
, force_p
);
3480 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
3487 /* Update window W if its flag must_be_updated_p is non-zero. If
3488 FORCE_P is non-zero, don't stop updating if input is pending. */
3491 update_single_window (struct window
*w
, int force_p
)
3493 if (w
->must_be_updated_p
)
3495 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3497 /* Record that this is not a frame-based redisplay. */
3498 set_frame_matrix_frame (NULL
);
3500 if (redisplay_dont_pause
)
3502 #if PERIODIC_PREEMPTION_CHECKING
3503 else if (NILP (Vredisplay_preemption_period
))
3505 else if (!force_p
&& NUMBERP (Vredisplay_preemption_period
))
3508 double p
= XFLOATINT (Vredisplay_preemption_period
);
3512 usec
= (p
- sec
) * 1000000;
3514 EMACS_GET_TIME (tm
);
3515 EMACS_SET_SECS_USECS (preemption_period
, sec
, usec
);
3516 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3522 update_window (w
, force_p
);
3525 /* Reset flag in W. */
3526 w
->must_be_updated_p
= 0;
3530 #ifdef HAVE_WINDOW_SYSTEM
3532 /* Redraw lines from the current matrix of window W that are
3533 overlapped by other rows. YB is bottom-most y-position in W. */
3536 redraw_overlapped_rows (struct window
*w
, int yb
)
3539 struct frame
*f
= XFRAME (WINDOW_FRAME (w
));
3541 /* If rows overlapping others have been changed, the rows being
3542 overlapped have to be redrawn. This won't draw lines that have
3543 already been drawn in update_window_line because overlapped_p in
3544 desired rows is 0, so after row assignment overlapped_p in
3545 current rows is 0. */
3546 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3548 struct glyph_row
*row
= w
->current_matrix
->rows
+ i
;
3550 if (!row
->enabled_p
)
3552 else if (row
->mode_line_p
)
3555 if (row
->overlapped_p
)
3557 enum glyph_row_area area
;
3559 for (area
= LEFT_MARGIN_AREA
; area
< LAST_AREA
; ++area
)
3562 updated_area
= area
;
3563 FRAME_RIF (f
)->cursor_to (i
, 0, row
->y
,
3564 area
== TEXT_AREA
? row
->x
: 0);
3565 if (row
->used
[area
])
3566 FRAME_RIF (f
)->write_glyphs (row
->glyphs
[area
],
3568 FRAME_RIF (f
)->clear_end_of_line (-1);
3571 row
->overlapped_p
= 0;
3574 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3580 /* Redraw lines from the current matrix of window W that overlap
3581 others. YB is bottom-most y-position in W. */
3584 redraw_overlapping_rows (struct window
*w
, int yb
)
3587 struct glyph_row
*row
;
3588 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3590 for (i
= 0; i
< w
->current_matrix
->nrows
; ++i
)
3592 row
= w
->current_matrix
->rows
+ i
;
3594 if (!row
->enabled_p
)
3596 else if (row
->mode_line_p
)
3599 bottom_y
= MATRIX_ROW_BOTTOM_Y (row
);
3601 if (row
->overlapping_p
)
3605 if (MATRIX_ROW_OVERLAPS_PRED_P (row
) && i
> 0
3606 && !MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
)
3607 overlaps
|= OVERLAPS_PRED
;
3608 if (MATRIX_ROW_OVERLAPS_SUCC_P (row
) && bottom_y
< yb
3609 && !MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
)
3610 overlaps
|= OVERLAPS_SUCC
;
3614 if (row
->used
[LEFT_MARGIN_AREA
])
3615 rif
->fix_overlapping_area (w
, row
, LEFT_MARGIN_AREA
, overlaps
);
3617 if (row
->used
[TEXT_AREA
])
3618 rif
->fix_overlapping_area (w
, row
, TEXT_AREA
, overlaps
);
3620 if (row
->used
[RIGHT_MARGIN_AREA
])
3621 rif
->fix_overlapping_area (w
, row
, RIGHT_MARGIN_AREA
, overlaps
);
3623 /* Record in neighbour rows that ROW overwrites part of
3625 if (overlaps
& OVERLAPS_PRED
)
3626 MATRIX_ROW (w
->current_matrix
, i
- 1)->overlapped_p
= 1;
3627 if (overlaps
& OVERLAPS_SUCC
)
3628 MATRIX_ROW (w
->current_matrix
, i
+ 1)->overlapped_p
= 1;
3637 #endif /* HAVE_WINDOW_SYSTEM */
3642 /* Check that no row in the current matrix of window W is enabled
3643 which is below what's displayed in the window. */
3646 check_current_matrix_flags (struct window
*w
)
3648 int last_seen_p
= 0;
3649 int i
, yb
= window_text_bottom_y (w
);
3651 for (i
= 0; i
< w
->current_matrix
->nrows
- 1; ++i
)
3653 struct glyph_row
*row
= MATRIX_ROW (w
->current_matrix
, i
);
3654 if (!last_seen_p
&& MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3656 else if (last_seen_p
&& row
->enabled_p
)
3661 #endif /* GLYPH_DEBUG */
3664 /* Update display of window W. FORCE_P non-zero means that we should
3665 not stop when detecting pending input. */
3668 update_window (struct window
*w
, int force_p
)
3670 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
3672 #if !PERIODIC_PREEMPTION_CHECKING
3673 int preempt_count
= baud_rate
/ 2400 + 1;
3675 extern int input_pending
;
3676 extern Lisp_Object do_mouse_tracking
;
3677 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3679 /* Check that W's frame doesn't have glyph matrices. */
3680 xassert (FRAME_WINDOW_P (XFRAME (WINDOW_FRAME (w
))));
3683 /* Check pending input the first time so that we can quickly return. */
3684 #if !PERIODIC_PREEMPTION_CHECKING
3686 detect_input_pending_ignore_squeezables ();
3689 /* If forced to complete the update, or if no input is pending, do
3691 if (force_p
|| !input_pending
|| !NILP (do_mouse_tracking
))
3693 struct glyph_row
*row
, *end
;
3694 struct glyph_row
*mode_line_row
;
3695 struct glyph_row
*header_line_row
;
3696 int yb
, changed_p
= 0, mouse_face_overwritten_p
= 0, n_updated
;
3698 rif
->update_window_begin_hook (w
);
3699 yb
= window_text_bottom_y (w
);
3701 /* If window has a header line, update it before everything else.
3702 Adjust y-positions of other rows by the header line height. */
3703 row
= desired_matrix
->rows
;
3704 end
= row
+ desired_matrix
->nrows
- 1;
3706 if (row
->mode_line_p
)
3708 header_line_row
= row
;
3712 header_line_row
= NULL
;
3714 /* Update the mode line, if necessary. */
3715 mode_line_row
= MATRIX_MODE_LINE_ROW (desired_matrix
);
3716 if (mode_line_row
->mode_line_p
&& mode_line_row
->enabled_p
)
3718 mode_line_row
->y
= yb
;
3719 update_window_line (w
, MATRIX_ROW_VPOS (mode_line_row
,
3721 &mouse_face_overwritten_p
);
3724 /* Find first enabled row. Optimizations in redisplay_internal
3725 may lead to an update with only one row enabled. There may
3726 be also completely empty matrices. */
3727 while (row
< end
&& !row
->enabled_p
)
3730 /* Try reusing part of the display by copying. */
3731 if (row
< end
&& !desired_matrix
->no_scrolling_p
)
3733 int rc
= scrolling_window (w
, header_line_row
!= NULL
);
3736 /* All rows were found to be equal. */
3742 /* We've scrolled the display. */
3748 /* Update the rest of the lines. */
3749 for (n_updated
= 0; row
< end
&& (force_p
|| !input_pending
); ++row
)
3752 int vpos
= MATRIX_ROW_VPOS (row
, desired_matrix
);
3755 /* We'll have to play a little bit with when to
3756 detect_input_pending. If it's done too often,
3757 scrolling large windows with repeated scroll-up
3758 commands will too quickly pause redisplay. */
3759 #if PERIODIC_PREEMPTION_CHECKING
3763 EMACS_GET_TIME (tm
);
3764 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
3765 if (EMACS_TIME_NEG_P (dif
))
3767 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
3768 if (detect_input_pending_ignore_squeezables ())
3773 if (!force_p
&& ++n_updated
% preempt_count
== 0)
3774 detect_input_pending_ignore_squeezables ();
3776 changed_p
|= update_window_line (w
, vpos
,
3777 &mouse_face_overwritten_p
);
3779 /* Mark all rows below the last visible one in the current
3780 matrix as invalid. This is necessary because of
3781 variable line heights. Consider the case of three
3782 successive redisplays, where the first displays 5
3783 lines, the second 3 lines, and the third 5 lines again.
3784 If the second redisplay wouldn't mark rows in the
3785 current matrix invalid, the third redisplay might be
3786 tempted to optimize redisplay based on lines displayed
3787 in the first redisplay. */
3788 if (MATRIX_ROW_BOTTOM_Y (row
) >= yb
)
3789 for (i
= vpos
+ 1; i
< w
->current_matrix
->nrows
- 1; ++i
)
3790 MATRIX_ROW (w
->current_matrix
, i
)->enabled_p
= 0;
3793 /* Was display preempted? */
3794 paused_p
= row
< end
;
3798 /* Update the header line after scrolling because a new header
3799 line would otherwise overwrite lines at the top of the window
3800 that can be scrolled. */
3801 if (header_line_row
&& header_line_row
->enabled_p
)
3803 header_line_row
->y
= 0;
3804 update_window_line (w
, 0, &mouse_face_overwritten_p
);
3807 /* Fix the appearance of overlapping/overlapped rows. */
3808 if (!paused_p
&& !w
->pseudo_window_p
)
3810 #ifdef HAVE_WINDOW_SYSTEM
3811 if (changed_p
&& rif
->fix_overlapping_area
)
3813 redraw_overlapped_rows (w
, yb
);
3814 redraw_overlapping_rows (w
, yb
);
3818 /* Make cursor visible at cursor position of W. */
3819 set_window_cursor_after_update (w
);
3821 #if 0 /* Check that current matrix invariants are satisfied. This is
3822 for debugging only. See the comment of check_matrix_invariants. */
3823 IF_DEBUG (check_matrix_invariants (w
));
3828 /* Remember the redisplay method used to display the matrix. */
3829 strcpy (w
->current_matrix
->method
, w
->desired_matrix
->method
);
3832 #ifdef HAVE_WINDOW_SYSTEM
3833 update_window_fringes (w
, 0);
3836 /* End the update of window W. Don't set the cursor if we
3837 paused updating the display because in this case,
3838 set_window_cursor_after_update hasn't been called, and
3839 output_cursor doesn't contain the cursor location. */
3840 rif
->update_window_end_hook (w
, !paused_p
, mouse_face_overwritten_p
);
3846 /* check_current_matrix_flags (w); */
3847 add_window_display_history (w
, w
->current_matrix
->method
, paused_p
);
3850 clear_glyph_matrix (desired_matrix
);
3856 /* Update the display of area AREA in window W, row number VPOS.
3857 AREA can be either LEFT_MARGIN_AREA or RIGHT_MARGIN_AREA. */
3860 update_marginal_area (struct window
*w
, int area
, int vpos
)
3862 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3863 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3865 /* Let functions in xterm.c know what area subsequent X positions
3866 will be relative to. */
3867 updated_area
= area
;
3869 /* Set cursor to start of glyphs, write them, and clear to the end
3870 of the area. I don't think that something more sophisticated is
3871 necessary here, since marginal areas will not be the default. */
3872 rif
->cursor_to (vpos
, 0, desired_row
->y
, 0);
3873 if (desired_row
->used
[area
])
3874 rif
->write_glyphs (desired_row
->glyphs
[area
], desired_row
->used
[area
]);
3875 rif
->clear_end_of_line (-1);
3879 /* Update the display of the text area of row VPOS in window W.
3880 Value is non-zero if display has changed. */
3883 update_text_area (struct window
*w
, int vpos
)
3885 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
3886 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
3887 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
3890 /* Let functions in xterm.c know what area subsequent X positions
3891 will be relative to. */
3892 updated_area
= TEXT_AREA
;
3894 /* If rows are at different X or Y, or rows have different height,
3895 or the current row is marked invalid, write the entire line. */
3896 if (!current_row
->enabled_p
3897 || desired_row
->y
!= current_row
->y
3898 || desired_row
->ascent
!= current_row
->ascent
3899 || desired_row
->phys_ascent
!= current_row
->phys_ascent
3900 || desired_row
->phys_height
!= current_row
->phys_height
3901 || desired_row
->visible_height
!= current_row
->visible_height
3902 || current_row
->overlapped_p
3903 /* This next line is necessary for correctly redrawing
3904 mouse-face areas after scrolling and other operations.
3905 However, it causes excessive flickering when mouse is moved
3906 across the mode line. Luckily, turning it off for the mode
3907 line doesn't seem to hurt anything. -- cyd.
3908 But it is still needed for the header line. -- kfs. */
3909 || (current_row
->mouse_face_p
3910 && !(current_row
->mode_line_p
&& vpos
> 0))
3911 || current_row
->x
!= desired_row
->x
)
3913 rif
->cursor_to (vpos
, 0, desired_row
->y
, desired_row
->x
);
3915 if (desired_row
->used
[TEXT_AREA
])
3916 rif
->write_glyphs (desired_row
->glyphs
[TEXT_AREA
],
3917 desired_row
->used
[TEXT_AREA
]);
3919 /* Clear to end of window. */
3920 rif
->clear_end_of_line (-1);
3923 /* This erases the cursor. We do this here because
3924 notice_overwritten_cursor cannot easily check this, which
3925 might indicate that the whole functionality of
3926 notice_overwritten_cursor would better be implemented here.
3927 On the other hand, we need notice_overwritten_cursor as long
3928 as mouse highlighting is done asynchronously outside of
3930 if (vpos
== w
->phys_cursor
.vpos
)
3931 w
->phys_cursor_on_p
= 0;
3936 struct glyph
*current_glyph
= current_row
->glyphs
[TEXT_AREA
];
3937 struct glyph
*desired_glyph
= desired_row
->glyphs
[TEXT_AREA
];
3938 int overlapping_glyphs_p
= current_row
->contains_overlapping_glyphs_p
;
3939 int desired_stop_pos
= desired_row
->used
[TEXT_AREA
];
3940 int abort_skipping
= 0;
3942 /* If the desired row extends its face to the text area end, and
3943 unless the current row also does so at the same position,
3944 make sure we write at least one glyph, so that the face
3945 extension actually takes place. */
3946 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
)
3947 && (desired_stop_pos
< current_row
->used
[TEXT_AREA
]
3948 || (desired_stop_pos
== current_row
->used
[TEXT_AREA
]
3949 && !MATRIX_ROW_EXTENDS_FACE_P (current_row
))))
3952 stop
= min (current_row
->used
[TEXT_AREA
], desired_stop_pos
);
3956 /* Loop over glyphs that current and desired row may have
3960 int can_skip_p
= !abort_skipping
;
3962 /* Skip over glyphs that both rows have in common. These
3963 don't have to be written. We can't skip if the last
3964 current glyph overlaps the glyph to its right. For
3965 example, consider a current row of `if ' with the `f' in
3966 Courier bold so that it overlaps the ` ' to its right.
3967 If the desired row is ` ', we would skip over the space
3968 after the `if' and there would remain a pixel from the
3969 `f' on the screen. */
3970 if (overlapping_glyphs_p
&& i
> 0)
3972 struct glyph
*glyph
= ¤t_row
->glyphs
[TEXT_AREA
][i
- 1];
3975 rif
->get_glyph_overhangs (glyph
, XFRAME (w
->frame
),
3977 can_skip_p
= (right
== 0 && !abort_skipping
);
3985 && GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
3987 x
+= desired_glyph
->pixel_width
;
3988 ++desired_glyph
, ++current_glyph
, ++i
;
3991 /* Consider the case that the current row contains "xxx
3992 ppp ggg" in italic Courier font, and the desired row
3993 is "xxx ggg". The character `p' has lbearing, `g'
3994 has not. The loop above will stop in front of the
3995 first `p' in the current row. If we would start
3996 writing glyphs there, we wouldn't erase the lbearing
3997 of the `p'. The rest of the lbearing problem is then
3998 taken care of by draw_glyphs. */
3999 if (overlapping_glyphs_p
4001 && i
< current_row
->used
[TEXT_AREA
]
4002 && (current_row
->used
[TEXT_AREA
]
4003 != desired_row
->used
[TEXT_AREA
]))
4007 rif
->get_glyph_overhangs (current_glyph
, XFRAME (w
->frame
),
4009 while (left
> 0 && i
> 0)
4011 --i
, --desired_glyph
, --current_glyph
;
4012 x
-= desired_glyph
->pixel_width
;
4013 left
-= desired_glyph
->pixel_width
;
4016 /* Abort the skipping algorithm if we end up before
4017 our starting point, to avoid looping (bug#1070).
4018 This can happen when the lbearing is larger than
4020 abort_skipping
= (i
< start_hpos
);
4024 /* Try to avoid writing the entire rest of the desired row
4025 by looking for a resync point. This mainly prevents
4026 mode line flickering in the case the mode line is in
4027 fixed-pitch font, which it usually will be. */
4028 if (i
< desired_row
->used
[TEXT_AREA
])
4030 int start_x
= x
, start_hpos
= i
;
4031 struct glyph
*start
= desired_glyph
;
4033 int skip_first_p
= !can_skip_p
;
4035 /* Find the next glyph that's equal again. */
4038 || !GLYPH_EQUAL_P (desired_glyph
, current_glyph
))
4041 x
+= desired_glyph
->pixel_width
;
4042 current_x
+= current_glyph
->pixel_width
;
4043 ++desired_glyph
, ++current_glyph
, ++i
;
4047 if (i
== start_hpos
|| x
!= current_x
)
4051 desired_glyph
= start
;
4055 rif
->cursor_to (vpos
, start_hpos
, desired_row
->y
, start_x
);
4056 rif
->write_glyphs (start
, i
- start_hpos
);
4061 /* Write the rest. */
4062 if (i
< desired_row
->used
[TEXT_AREA
])
4064 rif
->cursor_to (vpos
, i
, desired_row
->y
, x
);
4065 rif
->write_glyphs (desired_glyph
, desired_row
->used
[TEXT_AREA
] - i
);
4069 /* Maybe clear to end of line. */
4070 if (MATRIX_ROW_EXTENDS_FACE_P (desired_row
))
4072 /* If new row extends to the end of the text area, nothing
4073 has to be cleared, if and only if we did a write_glyphs
4074 above. This is made sure by setting desired_stop_pos
4075 appropriately above. */
4076 xassert (i
< desired_row
->used
[TEXT_AREA
]
4077 || ((desired_row
->used
[TEXT_AREA
]
4078 == current_row
->used
[TEXT_AREA
])
4079 && MATRIX_ROW_EXTENDS_FACE_P (current_row
)));
4081 else if (MATRIX_ROW_EXTENDS_FACE_P (current_row
))
4083 /* If old row extends to the end of the text area, clear. */
4084 if (i
>= desired_row
->used
[TEXT_AREA
])
4085 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4086 desired_row
->pixel_width
);
4087 rif
->clear_end_of_line (-1);
4090 else if (desired_row
->pixel_width
< current_row
->pixel_width
)
4092 /* Otherwise clear to the end of the old row. Everything
4093 after that position should be clear already. */
4096 if (i
>= desired_row
->used
[TEXT_AREA
])
4097 rif
->cursor_to (vpos
, i
, desired_row
->y
,
4098 desired_row
->pixel_width
);
4100 /* If cursor is displayed at the end of the line, make sure
4101 it's cleared. Nowadays we don't have a phys_cursor_glyph
4102 with which to erase the cursor (because this method
4103 doesn't work with lbearing/rbearing), so we must do it
4105 if (vpos
== w
->phys_cursor
.vpos
4106 && (desired_row
->reversed_p
4107 ? (w
->phys_cursor
.hpos
< 0)
4108 : (w
->phys_cursor
.hpos
>= desired_row
->used
[TEXT_AREA
])))
4110 w
->phys_cursor_on_p
= 0;
4114 x
= current_row
->pixel_width
;
4115 rif
->clear_end_of_line (x
);
4124 /* Update row VPOS in window W. Value is non-zero if display has been
4128 update_window_line (struct window
*w
, int vpos
, int *mouse_face_overwritten_p
)
4130 struct glyph_row
*current_row
= MATRIX_ROW (w
->current_matrix
, vpos
);
4131 struct glyph_row
*desired_row
= MATRIX_ROW (w
->desired_matrix
, vpos
);
4132 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4135 /* Set the row being updated. This is important to let xterm.c
4136 know what line height values are in effect. */
4137 updated_row
= desired_row
;
4139 /* A row can be completely invisible in case a desired matrix was
4140 built with a vscroll and then make_cursor_line_fully_visible shifts
4141 the matrix. Make sure to make such rows current anyway, since
4142 we need the correct y-position, for example, in the current matrix. */
4143 if (desired_row
->mode_line_p
4144 || desired_row
->visible_height
> 0)
4146 xassert (desired_row
->enabled_p
);
4148 /* Update display of the left margin area, if there is one. */
4149 if (!desired_row
->full_width_p
4150 && !NILP (w
->left_margin_cols
))
4153 update_marginal_area (w
, LEFT_MARGIN_AREA
, vpos
);
4156 /* Update the display of the text area. */
4157 if (update_text_area (w
, vpos
))
4160 if (current_row
->mouse_face_p
)
4161 *mouse_face_overwritten_p
= 1;
4164 /* Update display of the right margin area, if there is one. */
4165 if (!desired_row
->full_width_p
4166 && !NILP (w
->right_margin_cols
))
4169 update_marginal_area (w
, RIGHT_MARGIN_AREA
, vpos
);
4172 /* Draw truncation marks etc. */
4173 if (!current_row
->enabled_p
4174 || desired_row
->y
!= current_row
->y
4175 || desired_row
->visible_height
!= current_row
->visible_height
4176 || desired_row
->cursor_in_fringe_p
!= current_row
->cursor_in_fringe_p
4177 || desired_row
->overlay_arrow_bitmap
!= current_row
->overlay_arrow_bitmap
4178 || current_row
->redraw_fringe_bitmaps_p
4179 || desired_row
->mode_line_p
!= current_row
->mode_line_p
4180 || desired_row
->exact_window_width_line_p
!= current_row
->exact_window_width_line_p
4181 || (MATRIX_ROW_CONTINUATION_LINE_P (desired_row
)
4182 != MATRIX_ROW_CONTINUATION_LINE_P (current_row
)))
4183 rif
->after_update_window_line_hook (desired_row
);
4186 /* Update current_row from desired_row. */
4187 make_current (w
->desired_matrix
, w
->current_matrix
, vpos
);
4193 /* Set the cursor after an update of window W. This function may only
4194 be called from update_window. */
4197 set_window_cursor_after_update (struct window
*w
)
4199 struct frame
*f
= XFRAME (w
->frame
);
4200 struct redisplay_interface
*rif
= FRAME_RIF (f
);
4201 int cx
, cy
, vpos
, hpos
;
4203 /* Not intended for frame matrix updates. */
4204 xassert (FRAME_WINDOW_P (f
));
4206 if (cursor_in_echo_area
4207 && !NILP (echo_area_buffer
[0])
4208 /* If we are showing a message instead of the mini-buffer,
4209 show the cursor for the message instead. */
4210 && XWINDOW (minibuf_window
) == w
4211 && EQ (minibuf_window
, echo_area_window
)
4212 /* These cases apply only to the frame that contains
4213 the active mini-buffer window. */
4214 && FRAME_HAS_MINIBUF_P (f
)
4215 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4217 cx
= cy
= vpos
= hpos
= 0;
4219 if (cursor_in_echo_area
>= 0)
4221 /* If the mini-buffer is several lines high, find the last
4222 line that has any text on it. Note: either all lines
4223 are enabled or none. Otherwise we wouldn't be able to
4225 struct glyph_row
*row
, *last_row
;
4226 struct glyph
*glyph
;
4227 int yb
= window_text_bottom_y (w
);
4230 row
= w
->current_matrix
->rows
;
4231 while (row
->enabled_p
4232 && (last_row
== NULL
4233 || MATRIX_ROW_BOTTOM_Y (row
) <= yb
))
4235 if (row
->used
[TEXT_AREA
]
4236 && row
->glyphs
[TEXT_AREA
][0].charpos
>= 0)
4243 struct glyph
*start
= last_row
->glyphs
[TEXT_AREA
];
4244 struct glyph
*last
= start
+ last_row
->used
[TEXT_AREA
] - 1;
4246 while (last
> start
&& last
->charpos
< 0)
4249 for (glyph
= start
; glyph
< last
; ++glyph
)
4251 cx
+= glyph
->pixel_width
;
4256 vpos
= MATRIX_ROW_VPOS (last_row
, w
->current_matrix
);
4264 hpos
= w
->cursor
.hpos
;
4265 vpos
= w
->cursor
.vpos
;
4268 /* Window cursor can be out of sync for horizontally split windows. */
4269 hpos
= max (-1, hpos
); /* -1 is for when cursor is on the left fringe */
4270 hpos
= min (w
->current_matrix
->matrix_w
- 1, hpos
);
4271 vpos
= max (0, vpos
);
4272 vpos
= min (w
->current_matrix
->nrows
- 1, vpos
);
4273 rif
->cursor_to (vpos
, hpos
, cy
, cx
);
4277 /* Set WINDOW->must_be_updated_p to ON_P for all windows in the window
4278 tree rooted at W. */
4281 set_window_update_flags (struct window
*w
, int on_p
)
4285 if (!NILP (w
->hchild
))
4286 set_window_update_flags (XWINDOW (w
->hchild
), on_p
);
4287 else if (!NILP (w
->vchild
))
4288 set_window_update_flags (XWINDOW (w
->vchild
), on_p
);
4290 w
->must_be_updated_p
= on_p
;
4292 w
= NILP (w
->next
) ? 0 : XWINDOW (w
->next
);
4298 /***********************************************************************
4299 Window-Based Scrolling
4300 ***********************************************************************/
4302 /* Structure describing rows in scrolling_window. */
4306 /* Number of occurrences of this row in desired and current matrix. */
4307 int old_uses
, new_uses
;
4309 /* Vpos of row in new matrix. */
4310 int new_line_number
;
4312 /* Bucket index of this row_entry in the hash table row_table. */
4315 /* The row described by this entry. */
4316 struct glyph_row
*row
;
4318 /* Hash collision chain. */
4319 struct row_entry
*next
;
4322 /* A pool to allocate row_entry structures from, and the size of the
4323 pool. The pool is reallocated in scrolling_window when we find
4324 that we need a larger one. */
4326 static struct row_entry
*row_entry_pool
;
4327 static int row_entry_pool_size
;
4329 /* Index of next free entry in row_entry_pool. */
4331 static int row_entry_idx
;
4333 /* The hash table used during scrolling, and the table's size. This
4334 table is used to quickly identify equal rows in the desired and
4337 static struct row_entry
**row_table
;
4338 static int row_table_size
;
4340 /* Vectors of pointers to row_entry structures belonging to the
4341 current and desired matrix, and the size of the vectors. */
4343 static struct row_entry
**old_lines
, **new_lines
;
4344 static int old_lines_size
, new_lines_size
;
4346 /* A pool to allocate run structures from, and its size. */
4348 static struct run
*run_pool
;
4349 static int runs_size
;
4351 /* A vector of runs of lines found during scrolling. */
4353 static struct run
**runs
;
4355 /* Add glyph row ROW to the scrolling hash table during the scrolling
4358 static INLINE
struct row_entry
*
4359 add_row_entry (struct window
*w
, struct glyph_row
*row
)
4361 struct row_entry
*entry
;
4362 int i
= row
->hash
% row_table_size
;
4364 entry
= row_table
[i
];
4365 while (entry
&& !row_equal_p (w
, entry
->row
, row
, 1))
4366 entry
= entry
->next
;
4370 entry
= row_entry_pool
+ row_entry_idx
++;
4372 entry
->old_uses
= entry
->new_uses
= 0;
4373 entry
->new_line_number
= 0;
4375 entry
->next
= row_table
[i
];
4376 row_table
[i
] = entry
;
4383 /* Try to reuse part of the current display of W by scrolling lines.
4384 HEADER_LINE_P non-zero means W has a header line.
4386 The algorithm is taken from Communications of the ACM, Apr78 "A
4387 Technique for Isolating Differences Between Files." It should take
4390 A short outline of the steps of the algorithm
4392 1. Skip lines equal at the start and end of both matrices.
4394 2. Enter rows in the current and desired matrix into a symbol
4395 table, counting how often they appear in both matrices.
4397 3. Rows that appear exactly once in both matrices serve as anchors,
4398 i.e. we assume that such lines are likely to have been moved.
4400 4. Starting from anchor lines, extend regions to be scrolled both
4401 forward and backward.
4405 -1 if all rows were found to be equal.
4406 0 to indicate that we did not scroll the display, or
4407 1 if we did scroll. */
4410 scrolling_window (struct window
*w
, int header_line_p
)
4412 struct glyph_matrix
*desired_matrix
= w
->desired_matrix
;
4413 struct glyph_matrix
*current_matrix
= w
->current_matrix
;
4414 int yb
= window_text_bottom_y (w
);
4415 int i
, j
, first_old
, first_new
, last_old
, last_new
;
4416 int nruns
, nbytes
, n
, run_idx
;
4417 struct row_entry
*entry
;
4418 struct redisplay_interface
*rif
= FRAME_RIF (XFRAME (WINDOW_FRAME (w
)));
4420 /* Skip over rows equal at the start. */
4421 for (i
= header_line_p
? 1 : 0; i
< current_matrix
->nrows
- 1; ++i
)
4423 struct glyph_row
*d
= MATRIX_ROW (desired_matrix
, i
);
4424 struct glyph_row
*c
= MATRIX_ROW (current_matrix
, i
);
4428 && !d
->redraw_fringe_bitmaps_p
4430 && MATRIX_ROW_BOTTOM_Y (c
) <= yb
4431 && MATRIX_ROW_BOTTOM_Y (d
) <= yb
4432 && row_equal_p (w
, c
, d
, 1))
4441 /* Give up if some rows in the desired matrix are not enabled. */
4442 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4445 first_old
= first_new
= i
;
4447 /* Set last_new to the index + 1 of the last enabled row in the
4450 while (i
< desired_matrix
->nrows
- 1
4451 && MATRIX_ROW (desired_matrix
, i
)->enabled_p
4452 && MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (desired_matrix
, i
)) <= yb
)
4455 if (!MATRIX_ROW (desired_matrix
, i
)->enabled_p
)
4460 /* Set last_old to the index + 1 of the last enabled row in the
4461 current matrix. We don't look at the enabled flag here because
4462 we plan to reuse part of the display even if other parts are
4465 while (i
< current_matrix
->nrows
- 1)
4467 int bottom
= MATRIX_ROW_BOTTOM_Y (MATRIX_ROW (current_matrix
, i
));
4476 /* Skip over rows equal at the bottom. */
4479 while (i
- 1 > first_new
4480 && j
- 1 > first_old
4481 && MATRIX_ROW (current_matrix
, i
- 1)->enabled_p
4482 && (MATRIX_ROW (current_matrix
, i
- 1)->y
4483 == MATRIX_ROW (desired_matrix
, j
- 1)->y
)
4484 && !MATRIX_ROW (desired_matrix
, j
- 1)->redraw_fringe_bitmaps_p
4486 MATRIX_ROW (desired_matrix
, i
- 1),
4487 MATRIX_ROW (current_matrix
, j
- 1), 1))
4492 /* Nothing to do if all rows are equal. */
4493 if (last_new
== first_new
)
4496 /* Reallocate vectors, tables etc. if necessary. */
4498 if (current_matrix
->nrows
> old_lines_size
)
4500 old_lines_size
= current_matrix
->nrows
;
4501 nbytes
= old_lines_size
* sizeof *old_lines
;
4502 old_lines
= (struct row_entry
**) xrealloc (old_lines
, nbytes
);
4505 if (desired_matrix
->nrows
> new_lines_size
)
4507 new_lines_size
= desired_matrix
->nrows
;
4508 nbytes
= new_lines_size
* sizeof *new_lines
;
4509 new_lines
= (struct row_entry
**) xrealloc (new_lines
, nbytes
);
4512 n
= desired_matrix
->nrows
+ current_matrix
->nrows
;
4513 if (3 * n
> row_table_size
)
4515 row_table_size
= next_almost_prime (3 * n
);
4516 nbytes
= row_table_size
* sizeof *row_table
;
4517 row_table
= (struct row_entry
**) xrealloc (row_table
, nbytes
);
4518 memset (row_table
, 0, nbytes
);
4521 if (n
> row_entry_pool_size
)
4523 row_entry_pool_size
= n
;
4524 nbytes
= row_entry_pool_size
* sizeof *row_entry_pool
;
4525 row_entry_pool
= (struct row_entry
*) xrealloc (row_entry_pool
, nbytes
);
4528 if (desired_matrix
->nrows
> runs_size
)
4530 runs_size
= desired_matrix
->nrows
;
4531 nbytes
= runs_size
* sizeof *runs
;
4532 runs
= (struct run
**) xrealloc (runs
, nbytes
);
4533 nbytes
= runs_size
* sizeof *run_pool
;
4534 run_pool
= (struct run
*) xrealloc (run_pool
, nbytes
);
4537 nruns
= run_idx
= 0;
4540 /* Add rows from the current and desired matrix to the hash table
4541 row_hash_table to be able to find equal ones quickly. */
4543 for (i
= first_old
; i
< last_old
; ++i
)
4545 if (MATRIX_ROW (current_matrix
, i
)->enabled_p
)
4547 entry
= add_row_entry (w
, MATRIX_ROW (current_matrix
, i
));
4548 old_lines
[i
] = entry
;
4552 old_lines
[i
] = NULL
;
4555 for (i
= first_new
; i
< last_new
; ++i
)
4557 xassert (MATRIX_ROW_ENABLED_P (desired_matrix
, i
));
4558 entry
= add_row_entry (w
, MATRIX_ROW (desired_matrix
, i
));
4560 entry
->new_line_number
= i
;
4561 new_lines
[i
] = entry
;
4564 /* Identify moves based on lines that are unique and equal
4565 in both matrices. */
4566 for (i
= first_old
; i
< last_old
;)
4568 && old_lines
[i
]->old_uses
== 1
4569 && old_lines
[i
]->new_uses
== 1)
4572 int new_line
= old_lines
[i
]->new_line_number
;
4573 struct run
*run
= run_pool
+ run_idx
++;
4576 run
->current_vpos
= i
;
4577 run
->current_y
= MATRIX_ROW (current_matrix
, i
)->y
;
4578 run
->desired_vpos
= new_line
;
4579 run
->desired_y
= MATRIX_ROW (desired_matrix
, new_line
)->y
;
4581 run
->height
= MATRIX_ROW (current_matrix
, i
)->height
;
4583 /* Extend backward. */
4586 while (j
> first_old
4588 && old_lines
[j
] == new_lines
[k
])
4590 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4591 --run
->current_vpos
;
4592 --run
->desired_vpos
;
4595 run
->desired_y
-= h
;
4596 run
->current_y
-= h
;
4600 /* Extend forward. */
4605 && old_lines
[j
] == new_lines
[k
])
4607 int h
= MATRIX_ROW (current_matrix
, j
)->height
;
4613 /* Insert run into list of all runs. Order runs by copied
4614 pixel lines. Note that we record runs that don't have to
4615 be copied because they are already in place. This is done
4616 because we can avoid calling update_window_line in this
4618 for (j
= 0; j
< nruns
&& runs
[j
]->height
> run
->height
; ++j
)
4620 for (k
= nruns
; k
> j
; --k
)
4621 runs
[k
] = runs
[k
- 1];
4630 /* Do the moves. Do it in a way that we don't overwrite something
4631 we want to copy later on. This is not solvable in general
4632 because there is only one display and we don't have a way to
4633 exchange areas on this display. Example:
4635 +-----------+ +-----------+
4637 +-----------+ --> +-----------+
4639 +-----------+ +-----------+
4641 Instead, prefer bigger moves, and invalidate moves that would
4642 copy from where we copied to. */
4644 for (i
= 0; i
< nruns
; ++i
)
4645 if (runs
[i
]->nrows
> 0)
4647 struct run
*r
= runs
[i
];
4649 /* Copy on the display. */
4650 if (r
->current_y
!= r
->desired_y
)
4652 rif
->scroll_run_hook (w
, r
);
4654 /* Invalidate runs that copy from where we copied to. */
4655 for (j
= i
+ 1; j
< nruns
; ++j
)
4657 struct run
*p
= runs
[j
];
4659 if ((p
->current_y
>= r
->desired_y
4660 && p
->current_y
< r
->desired_y
+ r
->height
)
4661 || (p
->current_y
+ p
->height
>= r
->desired_y
4662 && (p
->current_y
+ p
->height
4663 < r
->desired_y
+ r
->height
)))
4668 /* Assign matrix rows. */
4669 for (j
= 0; j
< r
->nrows
; ++j
)
4671 struct glyph_row
*from
, *to
;
4672 int to_overlapped_p
;
4674 to
= MATRIX_ROW (current_matrix
, r
->desired_vpos
+ j
);
4675 from
= MATRIX_ROW (desired_matrix
, r
->desired_vpos
+ j
);
4676 to_overlapped_p
= to
->overlapped_p
;
4677 if (!from
->mode_line_p
&& !w
->pseudo_window_p
4678 && (to
->left_fringe_bitmap
!= from
->left_fringe_bitmap
4679 || to
->right_fringe_bitmap
!= from
->right_fringe_bitmap
4680 || to
->left_fringe_face_id
!= from
->left_fringe_face_id
4681 || to
->right_fringe_face_id
!= from
->right_fringe_face_id
4682 || to
->overlay_arrow_bitmap
!= from
->overlay_arrow_bitmap
))
4683 from
->redraw_fringe_bitmaps_p
= 1;
4684 assign_row (to
, from
);
4685 to
->enabled_p
= 1, from
->enabled_p
= 0;
4686 to
->overlapped_p
= to_overlapped_p
;
4690 /* Clear the hash table, for the next time. */
4691 for (i
= 0; i
< row_entry_idx
; ++i
)
4692 row_table
[row_entry_pool
[i
].bucket
] = NULL
;
4694 /* Value is > 0 to indicate that we scrolled the display. */
4700 /************************************************************************
4702 ************************************************************************/
4704 /* Update the desired frame matrix of frame F.
4706 FORCE_P non-zero means that the update should not be stopped by
4707 pending input. INHIBIT_HAIRY_ID_P non-zero means that scrolling
4708 should not be tried.
4710 Value is non-zero if update was stopped due to pending input. */
4713 update_frame_1 (struct frame
*f
, int force_p
, int inhibit_id_p
)
4715 /* Frame matrices to work on. */
4716 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
4717 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
4720 int preempt_count
= baud_rate
/ 2400 + 1;
4721 extern int input_pending
;
4723 xassert (current_matrix
&& desired_matrix
);
4725 if (baud_rate
!= FRAME_COST_BAUD_RATE (f
))
4726 calculate_costs (f
);
4728 if (preempt_count
<= 0)
4731 #if !PERIODIC_PREEMPTION_CHECKING
4732 if (!force_p
&& detect_input_pending_ignore_squeezables ())
4739 /* If we cannot insert/delete lines, it's no use trying it. */
4740 if (!FRAME_LINE_INS_DEL_OK (f
))
4743 /* See if any of the desired lines are enabled; don't compute for
4744 i/d line if just want cursor motion. */
4745 for (i
= 0; i
< desired_matrix
->nrows
; i
++)
4746 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4749 /* Try doing i/d line, if not yet inhibited. */
4750 if (!inhibit_id_p
&& i
< desired_matrix
->nrows
)
4751 force_p
|= scrolling (f
);
4753 /* Update the individual lines as needed. Do bottom line first. */
4754 if (MATRIX_ROW_ENABLED_P (desired_matrix
, desired_matrix
->nrows
- 1))
4755 update_frame_line (f
, desired_matrix
->nrows
- 1);
4757 /* Now update the rest of the lines. */
4758 for (i
= 0; i
< desired_matrix
->nrows
- 1 && (force_p
|| !input_pending
); i
++)
4760 if (MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4762 if (FRAME_TERMCAP_P (f
))
4764 /* Flush out every so many lines.
4765 Also flush out if likely to have more than 1k buffered
4766 otherwise. I'm told that some telnet connections get
4767 really screwed by more than 1k output at once. */
4768 FILE *display_output
= FRAME_TTY (f
)->output
;
4771 int outq
= PENDING_OUTPUT_COUNT (display_output
);
4773 || (outq
> 20 && ((i
- 1) % preempt_count
== 0)))
4775 fflush (display_output
);
4776 if (preempt_count
== 1)
4778 #ifdef EMACS_OUTQSIZE
4779 if (EMACS_OUTQSIZE (0, &outq
) < 0)
4780 /* Probably not a tty. Ignore the error and reset
4782 outq
= PENDING_OUTPUT_COUNT (FRAME_TTY (f
->output
));
4785 if (baud_rate
<= outq
&& baud_rate
> 0)
4786 sleep (outq
/ baud_rate
);
4792 #if PERIODIC_PREEMPTION_CHECKING
4796 EMACS_GET_TIME (tm
);
4797 EMACS_SUB_TIME (dif
, preemption_next_check
, tm
);
4798 if (EMACS_TIME_NEG_P (dif
))
4800 EMACS_ADD_TIME (preemption_next_check
, tm
, preemption_period
);
4801 if (detect_input_pending_ignore_squeezables ())
4806 if (!force_p
&& (i
- 1) % preempt_count
== 0)
4807 detect_input_pending_ignore_squeezables ();
4810 update_frame_line (f
, i
);
4814 pause
= (i
< FRAME_LINES (f
) - 1) ? i
: 0;
4816 /* Now just clean up termcap drivers and set cursor, etc. */
4819 if ((cursor_in_echo_area
4820 /* If we are showing a message instead of the mini-buffer,
4821 show the cursor for the message instead of for the
4822 (now hidden) mini-buffer contents. */
4823 || (EQ (minibuf_window
, selected_window
)
4824 && EQ (minibuf_window
, echo_area_window
)
4825 && !NILP (echo_area_buffer
[0])))
4826 /* These cases apply only to the frame that contains
4827 the active mini-buffer window. */
4828 && FRAME_HAS_MINIBUF_P (f
)
4829 && EQ (FRAME_MINIBUF_WINDOW (f
), echo_area_window
))
4831 int top
= WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f
)));
4834 if (cursor_in_echo_area
< 0)
4836 /* Negative value of cursor_in_echo_area means put
4837 cursor at beginning of line. */
4843 /* Positive value of cursor_in_echo_area means put
4844 cursor at the end of the prompt. If the mini-buffer
4845 is several lines high, find the last line that has
4847 row
= FRAME_LINES (f
);
4853 if (MATRIX_ROW_ENABLED_P (current_matrix
, row
))
4855 /* Frame rows are filled up with spaces that
4856 must be ignored here. */
4857 struct glyph_row
*r
= MATRIX_ROW (current_matrix
,
4859 struct glyph
*start
= r
->glyphs
[TEXT_AREA
];
4860 struct glyph
*last
= start
+ r
->used
[TEXT_AREA
];
4863 && (last
- 1)->charpos
< 0)
4869 while (row
> top
&& col
== 0);
4871 /* Make sure COL is not out of range. */
4872 if (col
>= FRAME_CURSOR_X_LIMIT (f
))
4874 /* If we have another row, advance cursor into it. */
4875 if (row
< FRAME_LINES (f
) - 1)
4877 col
= FRAME_LEFT_SCROLL_BAR_COLS (f
);
4880 /* Otherwise move it back in range. */
4882 col
= FRAME_CURSOR_X_LIMIT (f
) - 1;
4886 cursor_to (f
, row
, col
);
4890 /* We have only one cursor on terminal frames. Use it to
4891 display the cursor of the selected window. */
4892 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
4893 if (w
->cursor
.vpos
>= 0
4894 /* The cursor vpos may be temporarily out of bounds
4895 in the following situation: There is one window,
4896 with the cursor in the lower half of it. The window
4897 is split, and a message causes a redisplay before
4898 a new cursor position has been computed. */
4899 && w
->cursor
.vpos
< WINDOW_TOTAL_LINES (w
))
4901 int x
= WINDOW_TO_FRAME_HPOS (w
, w
->cursor
.hpos
);
4902 int y
= WINDOW_TO_FRAME_VPOS (w
, w
->cursor
.vpos
);
4904 if (INTEGERP (w
->left_margin_cols
))
4905 x
+= XFASTINT (w
->left_margin_cols
);
4907 /* x = max (min (x, FRAME_TOTAL_COLS (f) - 1), 0); */
4908 cursor_to (f
, y
, x
);
4915 clear_desired_matrices (f
);
4920 /* Do line insertions/deletions on frame F for frame-based redisplay. */
4923 scrolling (struct frame
*frame
)
4925 int unchanged_at_top
, unchanged_at_bottom
;
4928 int *old_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4929 int *new_hash
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4930 int *draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4931 int *old_draw_cost
= (int *) alloca (FRAME_LINES (frame
) * sizeof (int));
4933 int free_at_end_vpos
= FRAME_LINES (frame
);
4934 struct glyph_matrix
*current_matrix
= frame
->current_matrix
;
4935 struct glyph_matrix
*desired_matrix
= frame
->desired_matrix
;
4937 if (!current_matrix
)
4940 /* Compute hash codes of all the lines. Also calculate number of
4941 changed lines, number of unchanged lines at the beginning, and
4942 number of unchanged lines at the end. */
4944 unchanged_at_top
= 0;
4945 unchanged_at_bottom
= FRAME_LINES (frame
);
4946 for (i
= 0; i
< FRAME_LINES (frame
); i
++)
4948 /* Give up on this scrolling if some old lines are not enabled. */
4949 if (!MATRIX_ROW_ENABLED_P (current_matrix
, i
))
4951 old_hash
[i
] = line_hash_code (MATRIX_ROW (current_matrix
, i
));
4952 if (! MATRIX_ROW_ENABLED_P (desired_matrix
, i
))
4954 /* This line cannot be redrawn, so don't let scrolling mess it. */
4955 new_hash
[i
] = old_hash
[i
];
4956 #define INFINITY 1000000 /* Taken from scroll.c */
4957 draw_cost
[i
] = INFINITY
;
4961 new_hash
[i
] = line_hash_code (MATRIX_ROW (desired_matrix
, i
));
4962 draw_cost
[i
] = line_draw_cost (desired_matrix
, i
);
4965 if (old_hash
[i
] != new_hash
[i
])
4968 unchanged_at_bottom
= FRAME_LINES (frame
) - i
- 1;
4970 else if (i
== unchanged_at_top
)
4972 old_draw_cost
[i
] = line_draw_cost (current_matrix
, i
);
4975 /* If changed lines are few, don't allow preemption, don't scroll. */
4976 if ((!FRAME_SCROLL_REGION_OK (frame
)
4977 && changed_lines
< baud_rate
/ 2400)
4978 || unchanged_at_bottom
== FRAME_LINES (frame
))
4981 window_size
= (FRAME_LINES (frame
) - unchanged_at_top
4982 - unchanged_at_bottom
);
4984 if (FRAME_SCROLL_REGION_OK (frame
))
4985 free_at_end_vpos
-= unchanged_at_bottom
;
4986 else if (FRAME_MEMORY_BELOW_FRAME (frame
))
4987 free_at_end_vpos
= -1;
4989 /* If large window, fast terminal and few lines in common between
4990 current frame and desired frame, don't bother with i/d calc. */
4991 if (!FRAME_SCROLL_REGION_OK (frame
)
4992 && window_size
>= 18 && baud_rate
> 2400
4994 10 * scrolling_max_lines_saved (unchanged_at_top
,
4995 FRAME_LINES (frame
) - unchanged_at_bottom
,
4996 old_hash
, new_hash
, draw_cost
)))
4999 if (window_size
< 2)
5002 scrolling_1 (frame
, window_size
, unchanged_at_top
, unchanged_at_bottom
,
5003 draw_cost
+ unchanged_at_top
- 1,
5004 old_draw_cost
+ unchanged_at_top
- 1,
5005 old_hash
+ unchanged_at_top
- 1,
5006 new_hash
+ unchanged_at_top
- 1,
5007 free_at_end_vpos
- unchanged_at_top
);
5013 /* Count the number of blanks at the start of the vector of glyphs R
5014 which is LEN glyphs long. */
5017 count_blanks (struct glyph
*r
, int len
)
5021 for (i
= 0; i
< len
; ++i
)
5022 if (!CHAR_GLYPH_SPACE_P (r
[i
]))
5029 /* Count the number of glyphs in common at the start of the glyph
5030 vectors STR1 and STR2. END1 is the end of STR1 and END2 is the end
5031 of STR2. Value is the number of equal glyphs equal at the start. */
5034 count_match (struct glyph
*str1
, struct glyph
*end1
, struct glyph
*str2
, struct glyph
*end2
)
5036 struct glyph
*p1
= str1
;
5037 struct glyph
*p2
= str2
;
5041 && GLYPH_CHAR_AND_FACE_EQUAL_P (p1
, p2
))
5048 /* Char insertion/deletion cost vector, from term.c */
5050 extern int *char_ins_del_vector
;
5051 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_TOTAL_COLS((f))])
5054 /* Perform a frame-based update on line VPOS in frame FRAME. */
5057 update_frame_line (struct frame
*f
, int vpos
)
5059 struct glyph
*obody
, *nbody
, *op1
, *op2
, *np1
, *nend
;
5061 int osp
, nsp
, begmatch
, endmatch
, olen
, nlen
;
5062 struct glyph_matrix
*current_matrix
= f
->current_matrix
;
5063 struct glyph_matrix
*desired_matrix
= f
->desired_matrix
;
5064 struct glyph_row
*current_row
= MATRIX_ROW (current_matrix
, vpos
);
5065 struct glyph_row
*desired_row
= MATRIX_ROW (desired_matrix
, vpos
);
5066 int must_write_whole_line_p
;
5067 int write_spaces_p
= FRAME_MUST_WRITE_SPACES (f
);
5068 int colored_spaces_p
= (FACE_FROM_ID (f
, DEFAULT_FACE_ID
)->background
5069 != FACE_TTY_DEFAULT_BG_COLOR
);
5071 if (colored_spaces_p
)
5074 /* Current row not enabled means it has unknown contents. We must
5075 write the whole desired line in that case. */
5076 must_write_whole_line_p
= !current_row
->enabled_p
;
5077 if (must_write_whole_line_p
)
5084 obody
= MATRIX_ROW_GLYPH_START (current_matrix
, vpos
);
5085 olen
= current_row
->used
[TEXT_AREA
];
5087 /* Ignore trailing spaces, if we can. */
5088 if (!write_spaces_p
)
5089 while (olen
> 0 && CHAR_GLYPH_SPACE_P (obody
[olen
-1]))
5093 current_row
->enabled_p
= 1;
5094 current_row
->used
[TEXT_AREA
] = desired_row
->used
[TEXT_AREA
];
5096 /* If desired line is empty, just clear the line. */
5097 if (!desired_row
->enabled_p
)
5103 nbody
= desired_row
->glyphs
[TEXT_AREA
];
5104 nlen
= desired_row
->used
[TEXT_AREA
];
5105 nend
= nbody
+ nlen
;
5107 /* If display line has unknown contents, write the whole line. */
5108 if (must_write_whole_line_p
)
5110 /* Ignore spaces at the end, if we can. */
5111 if (!write_spaces_p
)
5112 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5115 /* Write the contents of the desired line. */
5118 cursor_to (f
, vpos
, 0);
5119 write_glyphs (f
, nbody
, nlen
);
5122 /* Don't call clear_end_of_line if we already wrote the whole
5123 line. The cursor will not be at the right margin in that
5124 case but in the line below. */
5125 if (nlen
< FRAME_TOTAL_COLS (f
))
5127 cursor_to (f
, vpos
, nlen
);
5128 clear_end_of_line (f
, FRAME_TOTAL_COLS (f
));
5131 /* Make sure we are in the right row, otherwise cursor movement
5132 with cmgoto might use `ch' in the wrong row. */
5133 cursor_to (f
, vpos
, 0);
5135 make_current (desired_matrix
, current_matrix
, vpos
);
5139 /* Pretend trailing spaces are not there at all,
5140 unless for one reason or another we must write all spaces. */
5141 if (!write_spaces_p
)
5142 while (nlen
> 0 && CHAR_GLYPH_SPACE_P (nbody
[nlen
- 1]))
5145 /* If there's no i/d char, quickly do the best we can without it. */
5146 if (!FRAME_CHAR_INS_DEL_OK (f
))
5150 /* Find the first glyph in desired row that doesn't agree with
5151 a glyph in the current row, and write the rest from there on. */
5152 for (i
= 0; i
< nlen
; i
++)
5154 if (i
>= olen
|| !GLYPH_EQUAL_P (nbody
+ i
, obody
+ i
))
5156 /* Find the end of the run of different glyphs. */
5160 || !GLYPH_EQUAL_P (nbody
+ j
, obody
+ j
)
5161 || CHAR_GLYPH_PADDING_P (nbody
[j
])))
5164 /* Output this run of non-matching chars. */
5165 cursor_to (f
, vpos
, i
);
5166 write_glyphs (f
, nbody
+ i
, j
- i
);
5169 /* Now find the next non-match. */
5173 /* Clear the rest of the line, or the non-clear part of it. */
5176 cursor_to (f
, vpos
, nlen
);
5177 clear_end_of_line (f
, olen
);
5180 /* Make current row = desired row. */
5181 make_current (desired_matrix
, current_matrix
, vpos
);
5185 /* Here when CHAR_INS_DEL_OK != 0, i.e. we can insert or delete
5186 characters in a row. */
5190 /* If current line is blank, skip over initial spaces, if
5191 possible, and write the rest. */
5195 nsp
= count_blanks (nbody
, nlen
);
5199 cursor_to (f
, vpos
, nsp
);
5200 write_glyphs (f
, nbody
+ nsp
, nlen
- nsp
);
5203 /* Exchange contents between current_frame and new_frame. */
5204 make_current (desired_matrix
, current_matrix
, vpos
);
5208 /* Compute number of leading blanks in old and new contents. */
5209 osp
= count_blanks (obody
, olen
);
5210 nsp
= (colored_spaces_p
? 0 : count_blanks (nbody
, nlen
));
5212 /* Compute number of matching chars starting with first non-blank. */
5213 begmatch
= count_match (obody
+ osp
, obody
+ olen
,
5214 nbody
+ nsp
, nbody
+ nlen
);
5216 /* Spaces in new match implicit space past the end of old. */
5217 /* A bug causing this to be a no-op was fixed in 18.29. */
5218 if (!write_spaces_p
&& osp
+ begmatch
== olen
)
5221 while (np1
+ begmatch
< nend
&& CHAR_GLYPH_SPACE_P (np1
[begmatch
]))
5225 /* Avoid doing insert/delete char
5226 just cause number of leading spaces differs
5227 when the following text does not match. */
5228 if (begmatch
== 0 && osp
!= nsp
)
5229 osp
= nsp
= min (osp
, nsp
);
5231 /* Find matching characters at end of line */
5234 op2
= op1
+ begmatch
- min (olen
- osp
, nlen
- nsp
);
5236 && GLYPH_EQUAL_P (op1
- 1, np1
- 1))
5241 endmatch
= obody
+ olen
- op1
;
5243 /* tem gets the distance to insert or delete.
5244 endmatch is how many characters we save by doing so.
5247 tem
= (nlen
- nsp
) - (olen
- osp
);
5249 && (!FRAME_CHAR_INS_DEL_OK (f
)
5250 || endmatch
<= char_ins_del_cost (f
)[tem
]))
5253 /* nsp - osp is the distance to insert or delete.
5254 If that is nonzero, begmatch is known to be nonzero also.
5255 begmatch + endmatch is how much we save by doing the ins/del.
5259 && (!FRAME_CHAR_INS_DEL_OK (f
)
5260 || begmatch
+ endmatch
<= char_ins_del_cost (f
)[nsp
- osp
]))
5264 osp
= nsp
= min (osp
, nsp
);
5267 /* Now go through the line, inserting, writing and
5268 deleting as appropriate. */
5272 cursor_to (f
, vpos
, nsp
);
5273 delete_glyphs (f
, osp
- nsp
);
5277 /* If going to delete chars later in line
5278 and insert earlier in the line,
5279 must delete first to avoid losing data in the insert */
5280 if (endmatch
&& nlen
< olen
+ nsp
- osp
)
5282 cursor_to (f
, vpos
, nlen
- endmatch
+ osp
- nsp
);
5283 delete_glyphs (f
, olen
+ nsp
- osp
- nlen
);
5284 olen
= nlen
- (nsp
- osp
);
5286 cursor_to (f
, vpos
, osp
);
5287 insert_glyphs (f
, 0, nsp
- osp
);
5291 tem
= nsp
+ begmatch
+ endmatch
;
5292 if (nlen
!= tem
|| olen
!= tem
)
5294 if (!endmatch
|| nlen
== olen
)
5296 /* If new text being written reaches right margin, there is
5297 no need to do clear-to-eol at the end of this function
5298 (and it would not be safe, since cursor is not going to
5299 be "at the margin" after the text is done). */
5300 if (nlen
== FRAME_TOTAL_COLS (f
))
5303 /* Function write_glyphs is prepared to do nothing
5304 if passed a length <= 0. Check it here to avoid
5305 unnecessary cursor movement. */
5308 cursor_to (f
, vpos
, nsp
+ begmatch
);
5309 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5312 else if (nlen
> olen
)
5314 /* Here, we used to have the following simple code:
5315 ----------------------------------------
5316 write_glyphs (nbody + nsp + begmatch, olen - tem);
5317 insert_glyphs (nbody + nsp + begmatch + olen - tem, nlen - olen);
5318 ----------------------------------------
5319 but it doesn't work if nbody[nsp + begmatch + olen - tem]
5320 is a padding glyph. */
5321 int out
= olen
- tem
; /* Columns to be overwritten originally. */
5324 cursor_to (f
, vpos
, nsp
+ begmatch
);
5326 /* Calculate columns we can actually overwrite. */
5327 while (CHAR_GLYPH_PADDING_P (nbody
[nsp
+ begmatch
+ out
]))
5329 write_glyphs (f
, nbody
+ nsp
+ begmatch
, out
);
5331 /* If we left columns to be overwritten, we must delete them. */
5332 del
= olen
- tem
- out
;
5334 delete_glyphs (f
, del
);
5336 /* At last, we insert columns not yet written out. */
5337 insert_glyphs (f
, nbody
+ nsp
+ begmatch
+ out
, nlen
- olen
+ del
);
5340 else if (olen
> nlen
)
5342 cursor_to (f
, vpos
, nsp
+ begmatch
);
5343 write_glyphs (f
, nbody
+ nsp
+ begmatch
, nlen
- tem
);
5344 delete_glyphs (f
, olen
- nlen
);
5350 /* If any unerased characters remain after the new line, erase them. */
5353 cursor_to (f
, vpos
, nlen
);
5354 clear_end_of_line (f
, olen
);
5357 /* Exchange contents between current_frame and new_frame. */
5358 make_current (desired_matrix
, current_matrix
, vpos
);
5363 /***********************************************************************
5364 X/Y Position -> Buffer Position
5365 ***********************************************************************/
5367 /* Determine what's under window-relative pixel position (*X, *Y).
5368 Return the object (string or buffer) that's there.
5369 Return in *POS the position in that object.
5370 Adjust *X and *Y to character positions. */
5373 buffer_posn_from_coords (struct window
*w
, int *x
, int *y
, struct display_pos
*pos
, Lisp_Object
*object
, int *dx
, int *dy
, int *width
, int *height
)
5376 Lisp_Object old_current_buffer
= Fcurrent_buffer ();
5377 struct text_pos startp
;
5379 struct glyph_row
*row
;
5380 #ifdef HAVE_WINDOW_SYSTEM
5381 struct image
*img
= 0;
5385 /* We used to set current_buffer directly here, but that does the
5386 wrong thing with `face-remapping-alist' (bug#2044). */
5387 Fset_buffer (w
->buffer
);
5388 SET_TEXT_POS_FROM_MARKER (startp
, w
->start
);
5389 CHARPOS (startp
) = min (ZV
, max (BEGV
, CHARPOS (startp
)));
5390 BYTEPOS (startp
) = min (ZV_BYTE
, max (BEGV_BYTE
, BYTEPOS (startp
)));
5391 start_display (&it
, w
, startp
);
5393 x0
= *x
- WINDOW_LEFT_MARGIN_WIDTH (w
);
5394 move_it_to (&it
, -1, x0
+ it
.first_visible_x
, *y
, -1,
5395 MOVE_TO_X
| MOVE_TO_Y
);
5397 Fset_buffer (old_current_buffer
);
5399 *dx
= x0
+ it
.first_visible_x
- it
.current_x
;
5400 *dy
= *y
- it
.current_y
;
5403 if (STRINGP (it
.string
))
5407 #ifdef HAVE_WINDOW_SYSTEM
5408 if (it
.what
== IT_IMAGE
)
5410 if ((img
= IMAGE_FROM_ID (it
.f
, it
.image_id
)) != NULL
5411 && !NILP (img
->spec
))
5412 *object
= img
->spec
;
5416 if (it
.vpos
< w
->current_matrix
->nrows
5417 && (row
= MATRIX_ROW (w
->current_matrix
, it
.vpos
),
5420 if (it
.hpos
< row
->used
[TEXT_AREA
])
5422 struct glyph
*glyph
= row
->glyphs
[TEXT_AREA
] + it
.hpos
;
5423 #ifdef HAVE_WINDOW_SYSTEM
5426 *dy
-= row
->ascent
- glyph
->ascent
;
5427 *dx
+= glyph
->slice
.x
;
5428 *dy
+= glyph
->slice
.y
;
5429 /* Image slices positions are still relative to the entire image */
5430 *width
= img
->width
;
5431 *height
= img
->height
;
5436 *width
= glyph
->pixel_width
;
5437 *height
= glyph
->ascent
+ glyph
->descent
;
5443 *height
= row
->height
;
5448 *width
= *height
= 0;
5451 /* Add extra (default width) columns if clicked after EOL. */
5452 x1
= max(0, it
.current_x
+ it
.pixel_width
- it
.first_visible_x
);
5454 it
.hpos
+= (x0
- x1
) / WINDOW_FRAME_COLUMN_WIDTH (w
);
5463 /* Value is the string under window-relative coordinates X/Y in the
5464 mode line or header line (PART says which) of window W, or nil if none.
5465 *CHARPOS is set to the position in the string returned. */
5468 mode_line_string (struct window
*w
, enum window_part part
, int *x
, int *y
, int *charpos
, Lisp_Object
*object
, int *dx
, int *dy
, int *width
, int *height
)
5470 struct glyph_row
*row
;
5471 struct glyph
*glyph
, *end
;
5473 Lisp_Object string
= Qnil
;
5475 if (part
== ON_MODE_LINE
)
5476 row
= MATRIX_MODE_LINE_ROW (w
->current_matrix
);
5478 row
= MATRIX_HEADER_LINE_ROW (w
->current_matrix
);
5480 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5482 if (row
->mode_line_p
&& row
->enabled_p
)
5484 /* Find the glyph under X. If we find one with a string object,
5485 it's the one we were looking for. */
5486 glyph
= row
->glyphs
[TEXT_AREA
];
5487 end
= glyph
+ row
->used
[TEXT_AREA
];
5488 for (x0
= *x
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5489 x0
-= glyph
->pixel_width
;
5490 *x
= glyph
- row
->glyphs
[TEXT_AREA
];
5493 string
= glyph
->object
;
5494 *charpos
= glyph
->charpos
;
5495 *width
= glyph
->pixel_width
;
5496 *height
= glyph
->ascent
+ glyph
->descent
;
5497 #ifdef HAVE_WINDOW_SYSTEM
5498 if (glyph
->type
== IMAGE_GLYPH
)
5501 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5503 *object
= img
->spec
;
5504 y0
-= row
->ascent
- glyph
->ascent
;
5510 /* Add extra (default width) columns if clicked after EOL. */
5511 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5513 *height
= row
->height
;
5520 *width
= *height
= 0;
5530 /* Value is the string under window-relative coordinates X/Y in either
5531 marginal area, or nil if none. *CHARPOS is set to the position in
5532 the string returned. */
5535 marginal_area_string (struct window
*w
, enum window_part part
, int *x
, int *y
, int *charpos
, Lisp_Object
*object
, int *dx
, int *dy
, int *width
, int *height
)
5537 struct glyph_row
*row
= w
->current_matrix
->rows
;
5538 struct glyph
*glyph
, *end
;
5539 int x0
, y0
, i
, wy
= *y
;
5541 Lisp_Object string
= Qnil
;
5543 if (part
== ON_LEFT_MARGIN
)
5544 area
= LEFT_MARGIN_AREA
;
5545 else if (part
== ON_RIGHT_MARGIN
)
5546 area
= RIGHT_MARGIN_AREA
;
5550 for (i
= 0; row
->enabled_p
&& i
< w
->current_matrix
->nrows
; ++i
, ++row
)
5551 if (wy
>= row
->y
&& wy
< MATRIX_ROW_BOTTOM_Y (row
))
5554 *y
= row
- MATRIX_FIRST_TEXT_ROW (w
->current_matrix
);
5558 /* Find the glyph under X. If we find one with a string object,
5559 it's the one we were looking for. */
5560 if (area
== RIGHT_MARGIN_AREA
)
5561 x0
= ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5562 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5563 : WINDOW_TOTAL_FRINGE_WIDTH (w
))
5564 + window_box_width (w
, LEFT_MARGIN_AREA
)
5565 + window_box_width (w
, TEXT_AREA
));
5567 x0
= (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w
)
5568 ? WINDOW_LEFT_FRINGE_WIDTH (w
)
5571 glyph
= row
->glyphs
[area
];
5572 end
= glyph
+ row
->used
[area
];
5573 for (x0
= *x
- x0
; glyph
< end
&& x0
>= glyph
->pixel_width
; ++glyph
)
5574 x0
-= glyph
->pixel_width
;
5575 *x
= glyph
- row
->glyphs
[area
];
5578 string
= glyph
->object
;
5579 *charpos
= glyph
->charpos
;
5580 *width
= glyph
->pixel_width
;
5581 *height
= glyph
->ascent
+ glyph
->descent
;
5582 #ifdef HAVE_WINDOW_SYSTEM
5583 if (glyph
->type
== IMAGE_GLYPH
)
5586 img
= IMAGE_FROM_ID (WINDOW_XFRAME (w
), glyph
->u
.img_id
);
5588 *object
= img
->spec
;
5589 y0
-= row
->ascent
- glyph
->ascent
;
5590 x0
+= glyph
->slice
.x
;
5591 y0
+= glyph
->slice
.y
;
5597 /* Add extra (default width) columns if clicked after EOL. */
5598 *x
+= x0
/ WINDOW_FRAME_COLUMN_WIDTH (w
);
5600 *height
= row
->height
;
5607 *width
= *height
= 0;
5617 /***********************************************************************
5618 Changing Frame Sizes
5619 ***********************************************************************/
5624 window_change_signal (int signalnum
) /* If we don't have an argument, */
5625 /* some compilers complain in signal calls. */
5628 int old_errno
= errno
;
5630 struct tty_display_info
*tty
;
5632 signal (SIGWINCH
, window_change_signal
);
5633 SIGNAL_THREAD_CHECK (signalnum
);
5635 /* The frame size change obviously applies to a single
5636 termcap-controlled terminal, but we can't decide which.
5637 Therefore, we resize the frames corresponding to each tty.
5639 for (tty
= tty_list
; tty
; tty
= tty
->next
) {
5641 if (! tty
->term_initted
)
5644 /* Suspended tty frames have tty->input == NULL avoid trying to
5649 get_tty_size (fileno (tty
->input
), &width
, &height
);
5651 if (width
> 5 && height
> 2) {
5652 Lisp_Object tail
, frame
;
5654 FOR_EACH_FRAME (tail
, frame
)
5655 if (FRAME_TERMCAP_P (XFRAME (frame
)) && FRAME_TTY (XFRAME (frame
)) == tty
)
5656 /* Record the new sizes, but don't reallocate the data
5657 structures now. Let that be done later outside of the
5659 change_frame_size (XFRAME (frame
), height
, width
, 0, 1, 0);
5665 #endif /* SIGWINCH */
5668 /* Do any change in frame size that was requested by a signal. SAFE
5669 non-zero means this function is called from a place where it is
5670 safe to change frame sizes while a redisplay is in progress. */
5673 do_pending_window_change (int safe
)
5675 /* If window_change_signal should have run before, run it now. */
5676 if (redisplaying_p
&& !safe
)
5679 while (delayed_size_change
)
5681 Lisp_Object tail
, frame
;
5683 delayed_size_change
= 0;
5685 FOR_EACH_FRAME (tail
, frame
)
5687 struct frame
*f
= XFRAME (frame
);
5689 if (f
->new_text_lines
!= 0 || f
->new_text_cols
!= 0)
5690 change_frame_size (f
, f
->new_text_lines
, f
->new_text_cols
,
5697 /* Change the frame height and/or width. Values may be given as zero to
5698 indicate no change is to take place.
5700 If DELAY is non-zero, then assume we're being called from a signal
5701 handler, and queue the change for later - perhaps the next
5702 redisplay. Since this tries to resize windows, we can't call it
5703 from a signal handler.
5705 SAFE non-zero means this function is called from a place where it's
5706 safe to change frame sizes while a redisplay is in progress. */
5709 change_frame_size (register struct frame
*f
, int newheight
, int newwidth
, int pretend
, int delay
, int safe
)
5711 Lisp_Object tail
, frame
;
5713 if (FRAME_MSDOS_P (f
))
5715 /* On MS-DOS, all frames use the same screen, so a change in
5716 size affects all frames. Termcap now supports multiple
5718 FOR_EACH_FRAME (tail
, frame
)
5719 if (! FRAME_WINDOW_P (XFRAME (frame
)))
5720 change_frame_size_1 (XFRAME (frame
), newheight
, newwidth
,
5721 pretend
, delay
, safe
);
5724 change_frame_size_1 (f
, newheight
, newwidth
, pretend
, delay
, safe
);
5728 change_frame_size_1 (register struct frame
*f
, int newheight
, int newwidth
, int pretend
, int delay
, int safe
)
5730 int new_frame_total_cols
;
5731 int count
= SPECPDL_INDEX ();
5733 /* If we can't deal with the change now, queue it for later. */
5734 if (delay
|| (redisplaying_p
&& !safe
))
5736 f
->new_text_lines
= newheight
;
5737 f
->new_text_cols
= newwidth
;
5738 delayed_size_change
= 1;
5742 /* This size-change overrides any pending one for this frame. */
5743 f
->new_text_lines
= 0;
5744 f
->new_text_cols
= 0;
5746 /* If an argument is zero, set it to the current value. */
5748 newheight
= FRAME_LINES (f
);
5750 newwidth
= FRAME_COLS (f
);
5752 /* Compute width of windows in F.
5753 This is the width of the frame without vertical scroll bars. */
5754 new_frame_total_cols
= FRAME_TOTAL_COLS_ARG (f
, newwidth
);
5756 /* Round up to the smallest acceptable size. */
5757 check_frame_size (f
, &newheight
, &newwidth
);
5759 /* If we're not changing the frame size, quit now. */
5760 /* Frame width may be unchanged but the text portion may change, for example,
5761 fullscreen and remove/add scroll bar. */
5762 if (newheight
== FRAME_LINES (f
)
5763 && newwidth
== FRAME_COLS (f
) // text portion unchanged
5764 && new_frame_total_cols
== FRAME_TOTAL_COLS (f
)) // frame width unchanged
5770 /* We only can set screen dimensions to certain values supported
5771 by our video hardware. Try to find the smallest size greater
5772 or equal to the requested dimensions. */
5773 dos_set_window_size (&newheight
, &newwidth
);
5776 if (newheight
!= FRAME_LINES (f
))
5778 if (FRAME_HAS_MINIBUF_P (f
) && !FRAME_MINIBUF_ONLY_P (f
))
5780 /* Frame has both root and mini-buffer. */
5781 XSETFASTINT (XWINDOW (FRAME_ROOT_WINDOW (f
))->top_line
,
5782 FRAME_TOP_MARGIN (f
));
5783 set_window_height (FRAME_ROOT_WINDOW (f
),
5786 - FRAME_TOP_MARGIN (f
)),
5788 XSETFASTINT (XWINDOW (FRAME_MINIBUF_WINDOW (f
))->top_line
,
5790 set_window_height (FRAME_MINIBUF_WINDOW (f
), 1, 0);
5793 /* Frame has just one top-level window. */
5794 set_window_height (FRAME_ROOT_WINDOW (f
),
5795 newheight
- FRAME_TOP_MARGIN (f
), 2);
5797 /* MSDOS frames cannot PRETEND, as they change frame size by
5798 manipulating video hardware. */
5799 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
5800 FrameRows (FRAME_TTY (f
)) = newheight
;
5803 if (new_frame_total_cols
!= FRAME_TOTAL_COLS (f
))
5805 set_window_width (FRAME_ROOT_WINDOW (f
), new_frame_total_cols
, 2);
5806 if (FRAME_HAS_MINIBUF_P (f
))
5807 set_window_width (FRAME_MINIBUF_WINDOW (f
), new_frame_total_cols
, 0);
5809 /* MSDOS frames cannot PRETEND, as they change frame size by
5810 manipulating video hardware. */
5811 if ((FRAME_TERMCAP_P (f
) && !pretend
) || FRAME_MSDOS_P (f
))
5812 FrameCols (FRAME_TTY (f
)) = newwidth
;
5814 if (WINDOWP (f
->tool_bar_window
))
5815 XSETFASTINT (XWINDOW (f
->tool_bar_window
)->total_cols
, newwidth
);
5818 FRAME_LINES (f
) = newheight
;
5819 SET_FRAME_COLS (f
, newwidth
);
5822 struct window
*w
= XWINDOW (FRAME_SELECTED_WINDOW (f
));
5823 int text_area_x
, text_area_y
, text_area_width
, text_area_height
;
5825 window_box (w
, TEXT_AREA
, &text_area_x
, &text_area_y
, &text_area_width
,
5827 if (w
->cursor
.x
>= text_area_x
+ text_area_width
)
5828 w
->cursor
.hpos
= w
->cursor
.x
= 0;
5829 if (w
->cursor
.y
>= text_area_y
+ text_area_height
)
5830 w
->cursor
.vpos
= w
->cursor
.y
= 0;
5834 calculate_costs (f
);
5835 SET_FRAME_GARBAGED (f
);
5840 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
5842 run_window_configuration_change_hook (f
);
5844 unbind_to (count
, Qnil
);
5849 /***********************************************************************
5850 Terminal Related Lisp Functions
5851 ***********************************************************************/
5853 DEFUN ("open-termscript", Fopen_termscript
, Sopen_termscript
,
5854 1, 1, "FOpen termscript file: ",
5855 doc
: /* Start writing all terminal output to FILE as well as the terminal.
5856 FILE = nil means just close any termscript file currently open. */)
5859 struct tty_display_info
*tty
;
5861 if (! FRAME_TERMCAP_P (SELECTED_FRAME ())
5862 && ! FRAME_MSDOS_P (SELECTED_FRAME ()))
5863 error ("Current frame is not on a tty device");
5867 if (tty
->termscript
!= 0)
5870 fclose (tty
->termscript
);
5873 tty
->termscript
= 0;
5877 file
= Fexpand_file_name (file
, Qnil
);
5878 tty
->termscript
= fopen (SDATA (file
), "w");
5879 if (tty
->termscript
== 0)
5880 report_file_error ("Opening termscript", Fcons (file
, Qnil
));
5886 DEFUN ("send-string-to-terminal", Fsend_string_to_terminal
,
5887 Ssend_string_to_terminal
, 1, 2, 0,
5888 doc
: /* Send STRING to the terminal without alteration.
5889 Control characters in STRING will have terminal-dependent effects.
5891 Optional parameter TERMINAL specifies the tty terminal device to use.
5892 It may be a terminal object, a frame, or nil for the terminal used by
5893 the currently selected frame. In batch mode, STRING is sent to stdout
5894 when TERMINAL is nil. */)
5895 (Lisp_Object string
, Lisp_Object terminal
)
5897 struct terminal
*t
= get_terminal (terminal
, 1);
5900 /* ??? Perhaps we should do something special for multibyte strings here. */
5901 CHECK_STRING (string
);
5905 error ("Unknown terminal device");
5907 if (t
->type
== output_initial
)
5909 else if (t
->type
!= output_termcap
&& t
->type
!= output_msdos_raw
)
5910 error ("Device %d is not a termcap terminal device", t
->id
);
5913 struct tty_display_info
*tty
= t
->display_info
.tty
;
5916 error ("Terminal is currently suspended");
5918 if (tty
->termscript
)
5920 fwrite (SDATA (string
), 1, SBYTES (string
), tty
->termscript
);
5921 fflush (tty
->termscript
);
5925 fwrite (SDATA (string
), 1, SBYTES (string
), out
);
5932 DEFUN ("ding", Fding
, Sding
, 0, 1, 0,
5933 doc
: /* Beep, or flash the screen.
5934 Also, unless an argument is given,
5935 terminate any keyboard macro currently executing. */)
5943 ring_bell (XFRAME (selected_frame
));
5952 bitch_at_user (void)
5956 else if (!INTERACTIVE
) /* Stop executing a keyboard macro. */
5957 error ("Keyboard macro terminated by a command ringing the bell");
5959 ring_bell (XFRAME (selected_frame
));
5964 /***********************************************************************
5966 ***********************************************************************/
5968 DEFUN ("sleep-for", Fsleep_for
, Ssleep_for
, 1, 2, 0,
5969 doc
: /* Pause, without updating display, for SECONDS seconds.
5970 SECONDS may be a floating-point value, meaning that you can wait for a
5971 fraction of a second. Optional second arg MILLISECONDS specifies an
5972 additional wait period, in milliseconds; this may be useful if your
5973 Emacs was built without floating point support.
5974 \(Not all operating systems support waiting for a fraction of a second.) */)
5975 (Lisp_Object seconds
, Lisp_Object milliseconds
)
5979 if (NILP (milliseconds
))
5980 XSETINT (milliseconds
, 0);
5982 CHECK_NUMBER (milliseconds
);
5983 usec
= XINT (milliseconds
) * 1000;
5986 double duration
= extract_float (seconds
);
5987 sec
= (int) duration
;
5988 usec
+= (duration
- sec
) * 1000000;
5991 #ifndef EMACS_HAS_USECS
5992 if (sec
== 0 && usec
!= 0)
5993 error ("Millisecond `sleep-for' not supported on %s", SYSTEM_TYPE
);
5996 /* Assure that 0 <= usec < 1000000. */
5999 /* We can't rely on the rounding being correct if usec is negative. */
6000 if (-1000000 < usec
)
6001 sec
--, usec
+= 1000000;
6003 sec
-= -usec
/ 1000000, usec
= 1000000 - (-usec
% 1000000);
6006 sec
+= usec
/ 1000000, usec
%= 1000000;
6008 if (sec
< 0 || (sec
== 0 && usec
== 0))
6011 wait_reading_process_output (sec
, usec
, 0, 0, Qnil
, NULL
, 0);
6017 /* This is just like wait_reading_process_output, except that
6020 TIMEOUT is number of seconds to wait (float or integer),
6021 or t to wait forever.
6022 READING is 1 if reading input.
6023 If DO_DISPLAY is >0 display process output while waiting.
6024 If DO_DISPLAY is >1 perform an initial redisplay before waiting.
6028 sit_for (Lisp_Object timeout
, int reading
, int do_display
)
6032 swallow_events (do_display
);
6034 if ((detect_input_pending_run_timers (do_display
))
6035 || !NILP (Vexecuting_kbd_macro
))
6038 if (do_display
>= 2)
6039 redisplay_preserve_echo_area (2);
6041 if (INTEGERP (timeout
))
6043 sec
= XINT (timeout
);
6046 else if (FLOATP (timeout
))
6048 double seconds
= XFLOAT_DATA (timeout
);
6049 sec
= (int) seconds
;
6050 usec
= (int) ((seconds
- sec
) * 1000000);
6052 else if (EQ (timeout
, Qt
))
6058 wrong_type_argument (Qnumberp
, timeout
);
6060 if (sec
== 0 && usec
== 0 && !EQ (timeout
, Qt
))
6067 wait_reading_process_output (sec
, usec
, reading
? -1 : 1, do_display
,
6070 return detect_input_pending () ? Qnil
: Qt
;
6074 DEFUN ("redisplay", Fredisplay
, Sredisplay
, 0, 1, 0,
6075 doc
: /* Perform redisplay if no input is available.
6076 If optional arg FORCE is non-nil or `redisplay-dont-pause' is non-nil,
6077 perform a full redisplay even if input is available.
6078 Return t if redisplay was performed, nil otherwise. */)
6084 if ((detect_input_pending_run_timers (1)
6085 && NILP (force
) && !redisplay_dont_pause
)
6086 || !NILP (Vexecuting_kbd_macro
))
6089 count
= SPECPDL_INDEX ();
6090 if (!NILP (force
) && !redisplay_dont_pause
)
6091 specbind (Qredisplay_dont_pause
, Qt
);
6092 redisplay_preserve_echo_area (2);
6093 unbind_to (count
, Qnil
);
6099 /***********************************************************************
6100 Other Lisp Functions
6101 ***********************************************************************/
6103 /* A vector of size >= 2 * NFRAMES + 3 * NBUFFERS + 1, containing the
6104 session's frames, frame names, buffers, buffer-read-only flags, and
6105 buffer-modified-flags. */
6107 static Lisp_Object frame_and_buffer_state
;
6110 DEFUN ("frame-or-buffer-changed-p", Fframe_or_buffer_changed_p
,
6111 Sframe_or_buffer_changed_p
, 0, 1, 0,
6112 doc
: /* Return non-nil if the frame and buffer state appears to have changed.
6113 VARIABLE is a variable name whose value is either nil or a state vector
6114 that will be updated to contain all frames and buffers,
6115 aside from buffers whose names start with space,
6116 along with the buffers' read-only and modified flags. This allows a fast
6117 check to see whether buffer menus might need to be recomputed.
6118 If this function returns non-nil, it updates the internal vector to reflect
6121 If VARIABLE is nil, an internal variable is used. Users should not
6122 pass nil for VARIABLE. */)
6123 (Lisp_Object variable
)
6125 Lisp_Object state
, tail
, frame
, buf
;
6126 Lisp_Object
*vecp
, *end
;
6129 if (! NILP (variable
))
6131 CHECK_SYMBOL (variable
);
6132 state
= Fsymbol_value (variable
);
6133 if (! VECTORP (state
))
6137 state
= frame_and_buffer_state
;
6139 vecp
= XVECTOR (state
)->contents
;
6140 end
= vecp
+ XVECTOR (state
)->size
;
6142 FOR_EACH_FRAME (tail
, frame
)
6146 if (!EQ (*vecp
++, frame
))
6150 if (!EQ (*vecp
++, XFRAME (frame
)->name
))
6153 /* Check that the buffer info matches. */
6154 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6156 buf
= XCDR (XCAR (tail
));
6157 /* Ignore buffers that aren't included in buffer lists. */
6158 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6162 if (!EQ (*vecp
++, buf
))
6166 if (!EQ (*vecp
++, XBUFFER (buf
)->read_only
))
6170 if (!EQ (*vecp
++, Fbuffer_modified_p (buf
)))
6175 /* Detect deletion of a buffer at the end of the list. */
6176 if (EQ (*vecp
, Qlambda
))
6179 /* Come here if we decide the data has changed. */
6181 /* Count the size we will need.
6182 Start with 1 so there is room for at least one lambda at the end. */
6184 FOR_EACH_FRAME (tail
, frame
)
6186 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6188 /* Reallocate the vector if data has grown to need it,
6189 or if it has shrunk a lot. */
6190 if (! VECTORP (state
)
6191 || n
> XVECTOR (state
)->size
6192 || n
+ 20 < XVECTOR (state
)->size
/ 2)
6193 /* Add 20 extra so we grow it less often. */
6195 state
= Fmake_vector (make_number (n
+ 20), Qlambda
);
6196 if (! NILP (variable
))
6197 Fset (variable
, state
);
6199 frame_and_buffer_state
= state
;
6202 /* Record the new data in the (possibly reallocated) vector. */
6203 vecp
= XVECTOR (state
)->contents
;
6204 FOR_EACH_FRAME (tail
, frame
)
6207 *vecp
++ = XFRAME (frame
)->name
;
6209 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
6211 buf
= XCDR (XCAR (tail
));
6212 /* Ignore buffers that aren't included in buffer lists. */
6213 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
6216 *vecp
++ = XBUFFER (buf
)->read_only
;
6217 *vecp
++ = Fbuffer_modified_p (buf
);
6219 /* Fill up the vector with lambdas (always at least one). */
6221 while (vecp
- XVECTOR (state
)->contents
6222 < XVECTOR (state
)->size
)
6224 /* Make sure we didn't overflow the vector. */
6225 if (vecp
- XVECTOR (state
)->contents
6226 > XVECTOR (state
)->size
)
6233 /***********************************************************************
6235 ***********************************************************************/
6237 /* Initialization done when Emacs fork is started, before doing stty.
6238 Determine terminal type and set terminal_driver. Then invoke its
6239 decoding routine to set up variables in the terminal package. */
6244 char *terminal_type
;
6246 #ifdef HAVE_X_WINDOWS
6247 extern int display_arg
;
6250 /* Construct the space glyph. */
6251 space_glyph
.type
= CHAR_GLYPH
;
6252 SET_CHAR_GLYPH (space_glyph
, ' ', DEFAULT_FACE_ID
, 0);
6253 space_glyph
.charpos
= -1;
6256 cursor_in_echo_area
= 0;
6257 terminal_type
= (char *) 0;
6259 /* Now is the time to initialize this; it's used by init_sys_modes
6261 Vinitial_window_system
= Qnil
;
6263 /* SIGWINCH needs to be handled no matter what display we start
6264 with. Otherwise newly opened tty frames will not resize
6269 #endif /* CANNOT_DUMP */
6270 signal (SIGWINCH
, window_change_signal
);
6271 #endif /* SIGWINCH */
6273 /* If running as a daemon, no need to initialize any frames/terminal. */
6277 /* If the user wants to use a window system, we shouldn't bother
6278 initializing the terminal. This is especially important when the
6279 terminal is so dumb that emacs gives up before and doesn't bother
6280 using the window system.
6282 If the DISPLAY environment variable is set and nonempty,
6283 try to use X, and die with an error message if that doesn't work. */
6285 #ifdef HAVE_X_WINDOWS
6286 if (! inhibit_window_system
&& ! display_arg
)
6289 display
= getenv ("DISPLAY");
6290 display_arg
= (display
!= 0 && *display
!= 0);
6292 if (display_arg
&& !x_display_ok (display
))
6294 fprintf (stderr
, "Display %s unavailable, simulating -nw\n",
6296 inhibit_window_system
= 1;
6300 if (!inhibit_window_system
&& display_arg
6306 Vinitial_window_system
= Qx
;
6308 Vwindow_system_version
= make_number (11);
6310 #if defined (GNU_LINUX) && defined (HAVE_LIBNCURSES)
6311 /* In some versions of ncurses,
6312 tputs crashes if we have not called tgetent.
6314 { char b
[2044]; tgetent (b
, "xterm");}
6316 adjust_frame_glyphs_initially ();
6319 #endif /* HAVE_X_WINDOWS */
6322 if (!inhibit_window_system
)
6324 Vinitial_window_system
= Qw32
;
6325 Vwindow_system_version
= make_number (1);
6326 adjust_frame_glyphs_initially ();
6329 #endif /* HAVE_NTGUI */
6332 if (!inhibit_window_system
6338 Vinitial_window_system
= Qns
;
6339 Vwindow_system_version
= make_number(10);
6340 adjust_frame_glyphs_initially ();
6345 /* If no window system has been specified, try to use the terminal. */
6348 fatal ("standard input is not a tty");
6353 terminal_type
= "w32console";
6355 /* Look at the TERM variable. */
6356 terminal_type
= (char *) getenv ("TERM");
6360 #ifdef HAVE_WINDOW_SYSTEM
6361 if (! inhibit_window_system
)
6362 fprintf (stderr
, "Please set the environment variable DISPLAY or TERM (see `tset').\n");
6364 #endif /* HAVE_WINDOW_SYSTEM */
6365 fprintf (stderr
, "Please set the environment variable TERM; see `tset'.\n");
6371 struct frame
*f
= XFRAME (selected_frame
);
6373 /* Open a display on the controlling tty. */
6374 t
= init_tty (0, terminal_type
, 1); /* Errors are fatal. */
6376 /* Convert the initial frame to use the new display. */
6377 if (f
->output_method
!= output_initial
)
6379 f
->output_method
= t
->type
;
6382 t
->reference_count
++;
6383 t
->display_info
.tty
->top_frame
= selected_frame
;
6384 change_frame_size (XFRAME (selected_frame
),
6385 FrameRows (t
->display_info
.tty
),
6386 FrameCols (t
->display_info
.tty
), 0, 0, 1);
6388 /* Delete the initial terminal. */
6389 if (--initial_terminal
->reference_count
== 0
6390 && initial_terminal
->delete_terminal_hook
)
6391 (*initial_terminal
->delete_terminal_hook
) (initial_terminal
);
6393 /* Update frame parameters to reflect the new type. */
6394 Fmodify_frame_parameters
6395 (selected_frame
, Fcons (Fcons (Qtty_type
,
6396 Ftty_type (selected_frame
)), Qnil
));
6397 if (t
->display_info
.tty
->name
)
6398 Fmodify_frame_parameters (selected_frame
,
6399 Fcons (Fcons (Qtty
, build_string (t
->display_info
.tty
->name
)),
6402 Fmodify_frame_parameters (selected_frame
, Fcons (Fcons (Qtty
, Qnil
),
6407 struct frame
*sf
= SELECTED_FRAME ();
6408 int width
= FRAME_TOTAL_COLS (sf
);
6409 int height
= FRAME_LINES (sf
);
6411 unsigned int total_glyphs
= height
* (width
+ 2) * sizeof (struct glyph
);
6413 /* If these sizes are so big they cause overflow, just ignore the
6414 change. It's not clear what better we could do. */
6415 if (total_glyphs
/ sizeof (struct glyph
) / height
!= width
+ 2)
6416 fatal ("screen size %dx%d too big", width
, height
);
6419 adjust_frame_glyphs_initially ();
6420 calculate_costs (XFRAME (selected_frame
));
6422 /* Set up faces of the initial terminal frame of a dumped Emacs. */
6425 && NILP (Vinitial_window_system
))
6427 /* For the initial frame, we don't have any way of knowing what
6428 are the foreground and background colors of the terminal. */
6429 struct frame
*sf
= SELECTED_FRAME();
6431 FRAME_FOREGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_FG_COLOR
;
6432 FRAME_BACKGROUND_PIXEL (sf
) = FACE_TTY_DEFAULT_BG_COLOR
;
6433 call0 (intern ("tty-set-up-initial-frame-faces"));
6439 /***********************************************************************
6441 ***********************************************************************/
6443 DEFUN ("internal-show-cursor", Finternal_show_cursor
,
6444 Sinternal_show_cursor
, 2, 2, 0,
6445 doc
: /* Set the cursor-visibility flag of WINDOW to SHOW.
6446 WINDOW nil means use the selected window. SHOW non-nil means
6447 show a cursor in WINDOW in the next redisplay. SHOW nil means
6448 don't show a cursor. */)
6449 (Lisp_Object window
, Lisp_Object show
)
6451 /* Don't change cursor state while redisplaying. This could confuse
6453 if (!redisplaying_p
)
6456 window
= selected_window
;
6458 CHECK_WINDOW (window
);
6460 XWINDOW (window
)->cursor_off_p
= NILP (show
);
6467 DEFUN ("internal-show-cursor-p", Finternal_show_cursor_p
,
6468 Sinternal_show_cursor_p
, 0, 1, 0,
6469 doc
: /* Value is non-nil if next redisplay will display a cursor in WINDOW.
6470 WINDOW nil or omitted means report on the selected window. */)
6471 (Lisp_Object window
)
6476 window
= selected_window
;
6478 CHECK_WINDOW (window
);
6480 w
= XWINDOW (window
);
6481 return w
->cursor_off_p
? Qnil
: Qt
;
6484 DEFUN ("last-nonminibuffer-frame", Flast_nonminibuf_frame
,
6485 Slast_nonminibuf_frame
, 0, 0, 0,
6486 doc
: /* Value is last nonminibuffer frame. */)
6489 Lisp_Object frame
= Qnil
;
6491 if (last_nonminibuf_frame
)
6492 XSETFRAME (frame
, last_nonminibuf_frame
);
6497 /***********************************************************************
6499 ***********************************************************************/
6502 syms_of_display (void)
6504 defsubr (&Sredraw_frame
);
6505 defsubr (&Sredraw_display
);
6506 defsubr (&Sframe_or_buffer_changed_p
);
6507 defsubr (&Sopen_termscript
);
6509 defsubr (&Sredisplay
);
6510 defsubr (&Ssleep_for
);
6511 defsubr (&Ssend_string_to_terminal
);
6512 defsubr (&Sinternal_show_cursor
);
6513 defsubr (&Sinternal_show_cursor_p
);
6514 defsubr (&Slast_nonminibuf_frame
);
6517 defsubr (&Sdump_redisplay_history
);
6520 frame_and_buffer_state
= Fmake_vector (make_number (20), Qlambda
);
6521 staticpro (&frame_and_buffer_state
);
6523 Qdisplay_table
= intern_c_string ("display-table");
6524 staticpro (&Qdisplay_table
);
6525 Qredisplay_dont_pause
= intern_c_string ("redisplay-dont-pause");
6526 staticpro (&Qredisplay_dont_pause
);
6528 DEFVAR_INT ("baud-rate", &baud_rate
,
6529 doc
: /* *The output baud rate of the terminal.
6530 On most systems, changing this value will affect the amount of padding
6531 and the other strategic decisions made during redisplay. */);
6533 DEFVAR_BOOL ("inverse-video", &inverse_video
,
6534 doc
: /* *Non-nil means invert the entire frame display.
6535 This means everything is in inverse video which otherwise would not be. */);
6537 DEFVAR_BOOL ("visible-bell", &visible_bell
,
6538 doc
: /* *Non-nil means try to flash the frame to represent a bell.
6540 See also `ring-bell-function'. */);
6542 DEFVAR_BOOL ("no-redraw-on-reenter", &no_redraw_on_reenter
,
6543 doc
: /* *Non-nil means no need to redraw entire frame after suspending.
6544 A non-nil value is useful if the terminal can automatically preserve
6545 Emacs's frame display when you reenter Emacs.
6546 It is up to you to set this variable if your terminal can do that. */);
6548 DEFVAR_LISP ("initial-window-system", &Vinitial_window_system
,
6549 doc
: /* Name of the window system that Emacs uses for the first frame.
6550 The value is a symbol--for instance, `x' for X windows.
6551 The value is nil if Emacs is using a text-only terminal. */);
6553 DEFVAR_KBOARD ("window-system", Vwindow_system
,
6554 doc
: /* Name of window system through which the selected frame is displayed.
6555 The value is a symbol--for instance, `x' for X windows.
6556 The value is nil if the selected frame is on a text-only-terminal. */);
6558 DEFVAR_LISP ("window-system-version", &Vwindow_system_version
,
6559 doc
: /* The version number of the window system in use.
6560 For X windows, this is 11. */);
6562 DEFVAR_BOOL ("cursor-in-echo-area", &cursor_in_echo_area
,
6563 doc
: /* Non-nil means put cursor in minibuffer, at end of any message there. */);
6565 DEFVAR_LISP ("glyph-table", &Vglyph_table
,
6566 doc
: /* Table defining how to output a glyph code to the frame.
6567 If not nil, this is a vector indexed by glyph code to define the glyph.
6568 Each element can be:
6569 integer: a glyph code which this glyph is an alias for.
6570 string: output this glyph using that string (not impl. in X windows).
6571 nil: this glyph mod 524288 is the code of a character to output,
6572 and this glyph / 524288 is the face number (see `face-id') to use
6573 while outputting it. */);
6574 Vglyph_table
= Qnil
;
6576 DEFVAR_LISP ("standard-display-table", &Vstandard_display_table
,
6577 doc
: /* Display table to use for buffers that specify none.
6578 See `buffer-display-table' for more information. */);
6579 Vstandard_display_table
= Qnil
;
6581 DEFVAR_BOOL ("redisplay-dont-pause", &redisplay_dont_pause
,
6582 doc
: /* *Non-nil means update isn't paused when input is detected. */);
6583 redisplay_dont_pause
= 0;
6585 #if PERIODIC_PREEMPTION_CHECKING
6586 DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period
,
6587 doc
: /* *The period in seconds between checking for input during redisplay.
6588 If input is detected, redisplay is pre-empted, and the input is processed.
6589 If nil, never pre-empt redisplay. */);
6590 Vredisplay_preemption_period
= make_float (0.10);
6597 Vinitial_window_system
= Qnil
;
6598 Vwindow_system_version
= Qnil
;
6602 /* arch-tag: 8d812b1f-04a2-4195-a9c4-381f8457a413
6603 (do not change this comment) */